View source for Strip control codes and extended characters from a string

{{task}}

;Task:
Strip control codes and extended characters from a string. 


The solution should demonstrate how to achieve each of the following results:
:* &nbsp; a string with control codes stripped (but extended characters not stripped)
:* &nbsp; a string with control codes and extended characters stripped


In ASCII, the control codes have decimal codes 0 through to 31 and 127. 

On an ASCII based system, if the control codes are stripped, the resultant string would have all of its characters within the range of 32 to 126 decimal on the ASCII table.

On a non-ASCII based system, we consider characters that do not have a corresponding glyph on the ASCII table (within the ASCII range of 32 to 126 decimal) to be an extended character for the purpose of this task.

{{Template:Strings}}
<br><br>

=={{header|11l}}==
{{trans|Python}}

<syntaxhighlight lang="11l">F stripped(s)
   R s.filter(i -> Int(i.code) C 32..126).join(‘’)

print(stripped("\ba\u0000b\n\rc\fd\xc3"))</syntaxhighlight>

{{out}}
<pre>
abcd
</pre>

=={{header|8086 Assembly}}==
<syntaxhighlight lang="asm">   .model small
   .stack 1024
   .data
StringStrip db "abc",13,10,8,7,"def",90h
   .code
	
start:

	mov ax,@data
	mov ds,ax
	
	mov ax,@code
	mov es,ax
	
	
	mov ax,03h
	int 10h      ;clear screen
	
	mov si,offset StringStrip
	call PrintString_PartiallyStripped
	
	call NewLine
	
	mov si,offset StringStrip
	call PrintString_Stripped

	mov ax,4C00h
	int 21h       ;return to DOS
	
PrintString_Stripped:
;prints a null-terminated string
;all other control codes are stripped.
	lodsb
	cmp al,0
	jz Terminated
	;not equal to zero
	cmp al,21h		 ; if (AL < 21h)
	jb PrintString_Stripped  ;skip this character and keep going
	cmp al,7Fh		 ; if (AL >= 7Fh)
	jae PrintString_Stripped ;skip this character and keep going
	        mov ah,02h
                mov dl,al
		int 21h           ;prints character in DL to screen
	jmp PrintString_Stripped
Terminated:
	ret
PrintString_PartiallyStripped:
;strips control codes but not extended ascii.
;The null terminator isn't stripped of course.
	lodsb
	cmp al,0
	jz Terminated_PartiallyStripped
	cmp al,21h
	jb PrintString_PartiallyStripped
	cmp al,7Fh
	je PrintString_PartiallyStripped ;delete counts as a control code
		mov ah,02h
		mov dl,al
		int 21h
	jmp PrintString_PartiallyStripped
Terminated_PartiallyStripped:
	ret

NewLine:
        mov ah,02h
        mov dl,13    ;carriage return
        int 10h
        mov ah,02h
        mov dl,10    ;line feed
        int 10h
        ret
        end start</syntaxhighlight>

{{out}}
<pre>
abcdefÉ
abcdef
</pre>

=={{header|Action!}}==
<syntaxhighlight lang="action!">BYTE FUNC IsAscii(CHAR c)
  IF c<32 OR c>124 OR c=96 OR c=123 THEN
    RETURN (0)
  FI
RETURN (1)

PROC Strip(CHAR ARRAY src,dst)
  CHAR c
  BYTE i

  dst(0)=0
  FOR i=1 TO src(0)
  DO
    c=src(i)
    IF IsAscii(c) THEN
      dst(0)==+1
      dst(dst(0))=c
    FI
  OD
RETURN

PROC Main()
  CHAR ARRAY
    src(20)=[16 0 16 96 123 'a 'b 'c 131 27 30 '1 '2 '3 4 1 20],
    dst(20)

  PrintF("Original string: ""%S""%E",src)
  Strip(src,dst)
  PrintF("Stripped string: ""%S""%E",dst)
RETURN</syntaxhighlight>
{{out}}
[https://gitlab.com/amarok8bit/action-rosetta-code/-/raw/master/images/Strip_control_codes_and_extended_characters_from_a_string.png Screenshot from Atari 8-bit computer]
<pre>
Original string: "♥♣♦♠abc┘←123┤├●"
Stripped string: "abc123"
</pre>

=={{header|Ada}}==

<syntaxhighlight lang="ada">with Ada.Text_IO;

procedure Strip_ASCII is

   Full: String := 'a' & Character'Val(11) & 'b' & Character'Val(166) &
                   'c' & Character'Val(127) & Character'Val(203) &
                   Character'Val(202) & "de";
   -- 5 ordinary characters ('a' .. 'e')
   -- 2 control characters (11, 127); note that 11 is the "vertical tab"
   -- 3 extended characters (166, 203, 202)

   function Filter(S:     String;
                   From:  Character := ' ';
                   To:    Character := Character'Val(126);
                   Above: Character := Character'Val(127)) return String is
   begin
      if S'Length = 0 then
         return "";
      elsif (S(S'First) >= From and then S(S'First) <= To) or else S(S'First) > Above then
         return S(S'First) & Filter(S(S'First+1 .. S'Last), From, To, Above);
      else
         return Filter(S(S'First+1 .. S'Last), From, To, Above);
      end if;
   end Filter;

   procedure Put_Line(Text, S: String) is
   begin
      Ada.Text_IO.Put_Line(Text & " """ & S & """, Length:" & Integer'Image(S'Length));
   end Put_Line;

begin
   Put_Line("The full string :", Full);
   Put_Line("No Control Chars:", Filter(Full)); -- default values for From, To, and Above
   Put_Line("Neither_Extended:", Filter(Full, Above => Character'Last)); -- defaults for From and To
end Strip_ASCII;
</syntaxhighlight>

Output:

<pre>The full string : "a
                    b�c��de", Length: 10
No Control Chars: "ab�c��de", Length: 8
Neither_Extended: "abcde", Length: 5</pre>

=={{header|ALGOL 68}}==
<syntaxhighlight lang="algol68"># remove control characters and optionally extended characters from the string text  #
# assums ASCII is the character set                                                  #
PROC strip characters = ( STRING text, BOOL strip extended )STRING:
     BEGIN
         # we build the result in a []CHAR and convert back to a string at the end #
         INT text start = LWB text;
         INT text max   = UPB text;
         [ text start : text max ]CHAR result;
         INT result pos := text start;
         FOR text pos FROM text start TO text max DO
             INT ch := ABS text[ text pos ];
             IF ( ch >= 0 AND ch <= 31 ) OR ch = 127 THEN
                 # control character #
                 SKIP
             ELIF strip extended AND ( ch > 126 OR ch < 0 ) THEN
                 # extened character and we don't want them #
                 SKIP
             ELSE
                 # include this character #
                 result[ result pos ] := REPR ch;
                 result pos +:= 1
             FI
         OD;
         result[ text start : result pos - 1 ]
     END # strip characters # ;

# test the control/extended character stripping procedure #
STRING t = REPR 2 + "abc" + REPR 10 + REPR 160 + "def~" + REPR 127 + REPR 10 + REPR 150 + REPR 152 + "!";
print( ( "<<" + t + ">> - without control characters:             <<" + strip characters( t, FALSE ) + ">>", newline ) );
print( ( "<<" + t + ">> - without control or extended characters: <<" + strip characters( t, TRUE  ) + ">>", newline ) )</syntaxhighlight>
{{out}}
<pre>
<<�abc
ádef~�
ûÿ!>> - without control characters:             <<abcádef~ûÿ!>>
<<�abc
ádef~�
ûÿ!>> - without control or extended characters: <<abcdef~!>>
</pre>

=={{header|Arturo}}==
<syntaxhighlight lang="rebol">str: {string of ☺☻♥♦⌂, may include control characters and other    ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.}

print "with extended characters"
print join select split str 'x ->
    not? in? to :integer to :char x (0..31)++127

print "without extended characters"
print join select split str 'x ->
    and? ascii? x
         not? in? to :integer to :char x (0..31)++127</syntaxhighlight>

{{out}}

<pre>with extended characters
string of ☺☻♥♦⌂, may include control characters and other    ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.
without extended characters
string of , may include control characters and other    ilk.</pre>

=={{header|AutoHotkey}}==
{{trans|Python}}
<syntaxhighlight lang="ahk">Stripped(x){
	Loop Parse, x
		if Asc(A_LoopField) > 31 and Asc(A_LoopField) < 128
			r .= A_LoopField
	return r
}
MsgBox % stripped("`ba" Chr(00) "b`n`rc`fd" Chr(0xc3))</syntaxhighlight>

=={{header|AWK}}==
<syntaxhighlight lang="awk">
# syntax: GAWK -f STRIP_CONTROL_CODES_AND_EXTENDED_CHARACTERS.AWK
BEGIN {
    s = "ab\xA2\x09z" # a b cent tab z
    printf("original string: %s (length %d)\n",s,length(s))
    gsub(/[\x00-\x1F\x7F]/,"",s); printf("control characters stripped: %s (length %d)\n",s,length(s))
    gsub(/[\x80-\xFF]/,"",s); printf("control and extended stripped: %s (length %d)\n",s,length(s))
    exit(0)
}
</syntaxhighlight>
<p>output:</p>
<pre>
original string: ab¢    z (length 5)
control characters stripped: ab¢z (length 4)
control and extended stripped: abz (length 3)
</pre>

=={{header|BASIC}}==
{{works with|QBasic}}

While DOS does support ''some'' extended characters, they aren't entirely standardized, and shouldn't be relied upon.

<syntaxhighlight lang="qbasic">DECLARE FUNCTION strip$ (what AS STRING)
DECLARE FUNCTION strip2$ (what AS STRING)

DIM x AS STRING, y AS STRING, z AS STRING

'   tab                c+cedilla           eof
x = CHR$(9) + "Fran" + CHR$(135) + "ais" + CHR$(26)
y = strip(x)
z = strip2(x)

PRINT "x:"; x
PRINT "y:"; y
PRINT "z:"; z

FUNCTION strip$ (what AS STRING)
    DIM outP AS STRING, L0 AS INTEGER, tmp AS STRING
    FOR L0 = 1 TO LEN(what)
        tmp = MID$(what, L0, 1)
        SELECT CASE ASC(tmp)
            CASE 32 TO 126
                outP = outP + tmp
        END SELECT
    NEXT
    strip$ = outP
END FUNCTION

FUNCTION strip2$ (what AS STRING)
    DIM outP AS STRING, L1 AS INTEGER, tmp AS STRING
    FOR L1 = 1 TO LEN(what)
        tmp = MID$(what, L1, 1)
        SELECT CASE ASC(tmp)
                'normal     accented    various     greek, math, etc.
            CASE 32 TO 126, 128 TO 168, 171 TO 175, 224 TO 253
                outP = outP + tmp
        END SELECT
    NEXT
    strip2$ = outP
END FUNCTION</syntaxhighlight>

Output:
 x:      Français→
 y:Franais
 z:Français

See also: [[#Liberty BASIC|Liberty BASIC]], [[#PureBasic|PureBasic]], [[#Run BASIC|Run BASIC]]

=={{header|BBC BASIC}}==
<syntaxhighlight lang="bbcbasic">      test$ = CHR$(9) + "Fran" + CHR$(231) + "ais." + CHR$(127)
      PRINT "Original ISO-8859-1 string: " test$ " (length " ; LEN(test$) ")"
      test$ = FNstripcontrol(test$)
      PRINT "Control characters stripped: " test$ " (length " ; LEN(test$) ")"
      test$ = FNstripextended(test$)
      PRINT "Control & extended stripped: " test$ " (length " ; LEN(test$) ")"
      END
      
      DEF FNstripcontrol(A$) : REM CHR$(127) is a 'control' code
      LOCAL I%
      WHILE I%<LEN(A$)
        I% += 1
        IF ASCMID$(A$,I%)<32 OR ASCMID$(A$,I%)=127 THEN
          A$ = LEFT$(A$,I%-1) + MID$(A$,I%+1)
        ENDIF
      ENDWHILE
      = A$
      
      DEF FNstripextended(A$)
      LOCAL I%
      WHILE I%<LEN(A$)
        I% += 1
        IF ASCMID$(A$,I%)>127 THEN
          A$ = LEFT$(A$,I%-1) + MID$(A$,I%+1)
        ENDIF
      ENDWHILE
      = A$</syntaxhighlight>
Output:
<pre>
Original ISO-8859-1 string:  Français (length 11)
Control characters stripped: Français. (length 9)
Control & extended stripped: Franais. (length 8)
</pre>

=={{header|BQN}}==
Using BQN's character arithmetic and comparison, characters are binned using <code>⍋</code> and removed if they are inside the range.

<syntaxhighlight lang="bqn">StripCt←((1≠(@+0‿32)⊸⍋)∧(@+127)⊸≠)⊸/
StripCtEx←(1=(@+32‿127)⊸⍋)⊸/</syntaxhighlight>
<syntaxhighlight lang="bqn">   RP←•rand.Deal∘≠⊸⊏ # Random Permutation
(rand).Deal∘≠⊸⊏
   ascii←RP @+↕256
s»ã®(Dj×\lÍt'C£rzËèv½`k7YW[¾]ÆF¥*=ïÝK§0m<Åàý!,JP%Xêÿ}8ñ¶u¿U-TúÞ
·Ä¬âç/ÃøªÎ#VÁ;Û ß6ÐiÜQÈ       d
                               ´ò3ÀA©üOØô&.nþ°³ö^c9ºa«2q1NæÖõäÂ  ¦
                                                                         wZóp""Ç+éS¨  "
   ≠ascii
256
   ≠StripCt ascii
223
   ≠StripCtEx ascii
95
   unicode←RP @+↕1000
"kȺ=<ɘΙͷƤ̀ÿʅ     Ɂ
ϋǒǩƽͱñȤȔ˯BVȱĶțŁ̅Ġ˄ͦ_ǸǦǂɫɒŦˏτȍ5ȒNļʛˁhĹȅǔʣͯĄż̜̍̕Œǳ͒ɹĵǖΤÐ)F±-ǿď͚ƒʵ̈́Ȳ̮ʷːΘ̊ʑĞ©ȗŕƟƹƁˤƩɦΡ̴@ʇ˃ʽ˜UęOīǋ1ϐΰŊ¿\ʞ8ʒȧ˾ƭķɡ͠#ǥȀšJŻ͛ȇǷcνĦǑƿƖ!ēö§ɎľêϘK¼ȋȮȕƓ×ȴȝȾȰÕÇ˸͐´ɝ·ȨŐƯ͎ʉΑ$>ʍʬɮΓeÛʋͽʥŨYÖ͇ͮƷ̾͌ƚP£ρŔόɊ̗σŝ͹Ͳʤώɓ͸˙ɀͅǯɤʦιΥÁû̓ž˒ξƢĪ̂̋ͩȫ̥̖͑7ĝÄΕı͆ØQ˘ɐƑ΀ő̼»̇űŚĒ²ĴT,Ȃ¯ϓυúɆɽÈ΂ˮ̏͡Ɛʭ̷˿ãąΧƌħǨŖ̱ɟ/Ǣɸπ         π̻
˖áčĈʔŠǪgΦ̑ƇʜƬĢέɲ͖ƈ͙ĚɇȖȩĆǽ̞ˑˬ^ʫϑĂEĜǝɜĨȭɈśœ˽şʲǅ͗ηɬ˧ßʮA̪ϧͤΒǭ̈ĿɏŹǄɗūʌͶ""ίʢɶʂʰˉÆ{Êʟ͓ͬɔŎΉϖθǻƅƛ̯ɃΪ̒ʈ΁ΐ˚ǁ̰΃¶Ȣɼ˶Ĕˢƫϛάɩ̣̄¬˦ʻÓ̙ɕ̘ëƘ̠˝˞ŽʙÑâŶŧϤ̟ªqƱi͂Ÿ˲ΛĖ˭ƾ̶ϟǞƉ̡W:ǌ͉̆ʚȎ¥ͥήxƗ˫ȟǘʸʡ¢̹u̎mĊˠÂϜͰƥŉw3ϊ΍ȏϕí˨̲Ƃϣ˺à͜Ο̩ɖ˔%͍ǗƕʺćD͏ơψ½Ôχ˕Ú˴ʹͣΞHȶ˟ϥǹ
                                                                                                                                                                                                 ȥ΄ǈͿå¸ʗ0ėČlˡ̭ǲîȜκŏþγyɚ͢Ǿ˅ʿ̓òŮ«͵ư*̨ϏǧŜ ͈ˇɿͫǉğ˱ŞƔƍÎİǠƺς
`ʴ;ƣ̦ȿˋʊƋ̢˩ºůŭè  Ȉ}jŤʐƜrɾ˥˓˼Þ[̺˛˳pìʏ́ěRǟɨƴ̝ɣǺʆÍƼÏζȷɛǫǶʧï̽õüȌɌ̳˪ɥƪǱøɄɻĘéņ?Řȳ̚
ȵΖƳɪ̃ł;ǰϦăCňȦ˹tÝċʎ9ϚμńΎεʨðɋ΅aɂįǊ˻Ȫ͕ύĮǮȐǬŅƃĭɉĤ΋ǐͧƮΜvƙƏƻǣĬϢŌˍλƀƦ¡ȠǤ·ȹZôLŵƲ̿α2ſʃµÅĕȞșͭo ř̬ź¹ǛƠŪβȑƶ+ȚȻbŲäƝͪfȘ̀ÀĉϡǙǍ     "
   ≠unicode
1000
   ≠StripCt unicode
967
   ≠StripCtEx unicode
95</syntaxhighlight>
=={{header|Bracmat}}==
<syntaxhighlight lang="bracmat">(  "string of ☺☻♥♦⌂, may include control
characters and other ilk.\L\D§►↔◄
Rødgrød med fløde"
  : ?string1
  : ?string2
& :?newString
&   whl
  ' ( @(!string1:?clean (%@:<" ") ?string1)
    & !newString !clean:?newString
    )
& !newString !string1:?newString
& out$(str$("Control characters stripped:
" str$!newString))
& :?newString
&   whl
  ' ( @(!string2:?clean (%@:(<" "|>"~")) ?string2)
    & !newString !clean:?newString
    )
& !newString !string2:?newString
&   out
  $ ( str
    $ ( "
Control characters and extended characters stripped:
"
        str$!newString
      )
    )
& );</syntaxhighlight>
Output:
<pre>Control characters stripped:
string of ⌂, may include controlcharacters and other ilk.§Rødgrød med fløde

Control characters and extended characters stripped:
string of , may include controlcharacters and other ilk.Rdgrd med flde</pre>

=={{header|C}}==

===<tt>filtered copy and swap</tt>===

Take advantage of the the fact that char is an 8-bit integer in C.<br>
Unsigned char is used throughout to enablethe extended ASCII set. <br>
A random function is called to generate a mix of good and bad values.<br>
A temp buffer is created with only valid characters, and swapped for the original.<br>
A true/false function checks if the character is in the valid range.<br>

<syntaxhighlight lang="c">#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define MAXBUF 256  /* limit */
#define STR_SZ 100  /* string size */ 


/* function prototypes */
int ascii (const unsigned char c);

int ascii_ext (const unsigned char c);

unsigned char* strip(unsigned char* str, const size_t n, int ext );


/* check a character 
   return 1 for true
          0 for false
*/ 
int ascii (const unsigned char c) 
{  
  unsigned char min = 32;   /* <space> */
  unsigned char max = 126;  /* ~ tilde */

  if ( c>=min && c<=max ) return 1;

  return 0;
} 


/* check if extended character 
   return 1 for true
          0 for false
*/ 
int ascii_ext (const unsigned char c) 
{  
  unsigned char min_ext = 128;   
  unsigned char max_ext = 255;

  if ( c>=min_ext && c<=max_ext )
       return 1;

  return 0;
} 


/* fill buffer with only ASCII valid characters
   then rewrite string from buffer
   limit to n < MAX chars
*/

unsigned char* strip( unsigned char* str, const size_t n, int ext) 
{ 

  unsigned char buffer[MAXBUF] = {'\0'};

  size_t i = 0;  // source index
  size_t j = 0;  // dest   index

  size_t max = (n<MAXBUF)? n : MAXBUF -1;  // limit size

  while (i < max )
    {
      if ( (ext && ascii_ext(str[i]) ) ||  (ascii(str[i]) ) )    // check
	{
	  buffer[j++] = str[i]; // assign
	}      
      i++;
    }

  memset(str, '\0', max); // wipe string 

  i = 0;               // reset count

  while( i < j)
    {
      str[i] = buffer[i]; // copy back
      i++;
    }

  str[j] = '\0';  // terminate properly

  return str;  
}

/* try it out */
int main( int argc, char** argv)
{
  enum {ASCII=0, EXT=1}; /* enumeration makes easier reading */

  unsigned int seed = 134529;  // RNG seed value

  /* variables and storage */
  unsigned char badstring[STR_SZ] = {'\0'};
  unsigned char bs_2[STR_SZ]      = {'\0'};
 
  unsigned char* goodstring = NULL;
  unsigned char* goodstring_ext = NULL;

  size_t i = 0;

  srand(seed); /* seed RNG */

  fprintf(stdout, "Original:\t" );

  /* generate a random string */
  for (i = 0; i < STR_SZ; i++)
    {
      badstring[i] = (unsigned char) ( rand () & (unsigned char)0xFF );
      fprintf(stdout, "%c", badstring[i] );
    }
  fprintf(stdout, "\n");

   
   memcpy(bs_2, badstring, STR_SZ * sizeof(unsigned char) ); /* copy string */

   goodstring_ext = strip( badstring, STR_SZ, EXT); /* remove non-extended and non-ascii */

   fprintf(stdout, "\nEXT:\t%s\n" , goodstring_ext );

   goodstring = strip( bs_2, STR_SZ, ASCII); /* remove all non-ascii */
  
   fprintf(stdout, "\nASCII:\t%s\n" , goodstring );
  
return 0;
}</syntaxhighlight>

{{out}}
Original:	ƒ˜v�ý8Ç…Ø×�B„…â¤Ê8ln9V¢DèÝz�@ÅTÃ]ÊÙZ� ßÚwo�ûôÿ ¾8  ,qcÎ¶K¬0aìõ¶¯R€ˆƒ(Œ]Ÿüz›ðz;¯²GÛ#ªªÙöV z WñQŽyþ�¡

EXT:	ƒ˜vý8Ç…Ø×�B„…â¤Ê8ln9V¢DèÝz@ÅTÃ]ÊÙZ ßÚwoûôÿ ¾8,qcÎ¶K¬0aìõ¶¯R€ˆƒ(Œ]Ÿüz›ðz;¯²GÛ#ªªÙöVWBþñQŽyþ¡</span>

ASCII:	v8B8ln9VDz@T]Zwo8,qcK0aR(]zz;G#VWBQy



===<tt>apply mask from a table</tt>===
<syntaxhighlight lang="c">#include <stdio.h>
#include <stdlib.h>

#define IS_CTRL  (1 << 0)
#define IS_EXT	 (1 << 1)
#define IS_ALPHA (1 << 2)
#define IS_DIGIT (1 << 3) /* not used, just give you an idea */

unsigned int char_tbl[256] = {0};

/* could use ctypes, but then they pretty much do the same thing */
void init_table()
{
	int i;

	for (i = 0; i < 32; i++) char_tbl[i] |= IS_CTRL;
	char_tbl[127] |= IS_CTRL;

	for (i = 'A'; i <= 'Z'; i++) {
		char_tbl[i] |= IS_ALPHA;
		char_tbl[i + 0x20] |= IS_ALPHA; /* lower case */
	}

	for (i = 128; i < 256; i++) char_tbl[i] |= IS_EXT;
}

/* depends on what "stripped" means; we do it in place.
 * "what" is a combination of the IS_* macros, meaning strip if
 * a char IS_ any of them
 */
void strip(char * str, int what)
{
	unsigned char *ptr, *s = (void*)str;
	ptr = s;
	while (*s != '\0') {
		if ((char_tbl[(int)*s] & what) == 0)
			*(ptr++) = *s;
		s++;
	}
	*ptr = '\0';
}

int main()
{
	char a[256];
	int i;

	init_table();

	/* populate string with one of each char */
	for (i = 1; i < 255; i++) a[i - 1] = i; a[255] = '\0';
	strip(a, IS_CTRL);
	printf("%s\n", a);

	for (i = 1; i < 255; i++) a[i - 1] = i; a[255] = '\0';
	strip(a, IS_CTRL | IS_EXT);
	printf("%s\n", a);

	for (i = 1; i < 255; i++) a[i - 1] = i; a[255] = '\0';
	strip(a, IS_CTRL | IS_EXT | IS_ALPHA);
	printf("%s\n", a);

	return 0;
}</syntaxhighlight>output:<syntaxhighlight lang="text"> !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ <odd stuff my xterm thinks are bad unicode hence can't be properly shown>
 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
 !"#$%&'()*+,-./0123456789:;<=>?@[\]^_`{|}~</syntaxhighlight>

=={{header|C sharp|C#}}==
Uses the test string from REXX.
<syntaxhighlight lang="csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RosettaCode
{
    class Program
    {
        static void Main(string[] args)
        {
            string test = "string of ☺☻♥♦⌂, may include control characters and other ilk.♫☼§►↔◄";
            Console.WriteLine("Original: {0}", test);
            Console.WriteLine("Stripped of control codes: {0}", StripControlChars(test));
            Console.WriteLine("Stripped of extended: {0}", StripExtended(test));
        }

        static string StripControlChars(string arg)
        {
            char[] arrForm = arg.ToCharArray();
            StringBuilder buffer = new StringBuilder(arg.Length);//This many chars at most
            
            foreach(char ch in arrForm)
                if (!Char.IsControl(ch)) buffer.Append(ch);//Only add to buffer if not a control char

            return buffer.ToString();
        }

        static string StripExtended(string arg)
        {
            StringBuilder buffer = new StringBuilder(arg.Length); //Max length
            foreach(char ch in arg)
            {
                UInt16 num = Convert.ToUInt16(ch);//In .NET, chars are UTF-16
                //The basic characters have the same code points as ASCII, and the extended characters are bigger
                if((num >= 32u) && (num <= 126u)) buffer.Append(ch);
            }
            return buffer.ToString();
        }
    }
}
</syntaxhighlight>
Output: 
<pre>
Original: string of ☺☻♥♦⌂, may include control characters and other ilk.♫☼§►↔◄
Stripped of control codes: string of ☺☻♥♦⌂, may include control characters and other ilk.♫☼§►↔◄
Stripped of extended: string of , may include control characters and other ilk.
</pre>

=={{header|C++}}==
<syntaxhighlight lang="cpp">#include <string>
#include <iostream>
#include <algorithm>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/casts.hpp>
#include <ctime>
#include <cstdlib>
using namespace boost::lambda ;

struct MyRandomizer {
   char operator( )( ) {
      return static_cast<char>( rand( ) % 256 ) ;
   }
} ;

std::string deleteControls ( std::string startstring ) {
   std::string noControls( "                                        " ) ;//creating space for 
   //the standard algorithm remove_copy_if
   std::remove_copy_if( startstring.begin( ) , startstring.end( ) , noControls.begin( ) ,
	 ll_static_cast<int>( _1 ) < 32 && ll_static_cast<int>( _1 ) == 127 ) ;
   return noControls ;
}

std::string deleteExtended( std::string startstring ) {
   std::string noExtended ( "                                        " ) ;//same as above
   std::remove_copy_if( startstring.begin( ) , startstring.end( ) , noExtended.begin( ) ,
	 ll_static_cast<int>( _1 ) > 127 || ll_static_cast<int>( _1 ) < 32 ) ;
   return noExtended ;
}
   
int main( ) {
   std::string my_extended_string ;
   for ( int i = 0 ; i < 40 ; i++ ) //we want the extended string to be 40 characters long
      my_extended_string.append( " " ) ;
   srand( time( 0 ) ) ;
   std::generate_n( my_extended_string.begin( ) , 40 , MyRandomizer( ) ) ;
   std::string no_controls( deleteControls( my_extended_string ) ) ;
   std::string no_extended ( deleteExtended( my_extended_string ) ) ;
   std::cout << "string with all characters: " << my_extended_string << std::endl ;
   std::cout << "string without control characters: " << no_controls << std::endl ;
   std::cout << "string without extended characters: " << no_extended << std::endl ;
   return 0 ;
}</syntaxhighlight>
Output:
<PRE>string with all characters: K�O:~���7�5����
���W��@>��ȓ�q�Q@���W-
string without control characters: K�O:~���7�5����
���W��@>��ȓ�q�Q@���W-
string without extended characters: KO:~75W@>qQ@W-    
</PRE>

=={{header|Clojure}}==
<syntaxhighlight lang="clojure">; generate our test string of characters with control and extended characters
(def range-of-chars (apply str (map char (range 256))))

; filter out the control characters:
(apply str (filter #(not (Character/isISOControl %)) range-of-chars))

; filter to return String of characters that are between 32 - 126:
(apply str (filter #(<= 32 (int %) 126) range-of-chars))</syntaxhighlight>

=={{header|Common Lisp}}==
<pre>
(defun control-char-p (ch)
  (or (< (char-code ch) 32)
      (= (char-code ch) 127)))

(defun extended-char-p (ch)
  (> (char-code ch) 127))

(defun strip-special-chars (string &key strip-extended)
  (let ((needs-removing-p (if strip-extended
                              (lambda (ch)
                                (or (control-char-p ch)
                                    (extended-char-p ch)))
                              #'control-char-p)))
    (remove-if needs-removing-p string)))
</pre>

=={{header|D}}==
<syntaxhighlight lang="d">import std.traits;

S stripChars(S)(S s, bool function(dchar) pure nothrow mustStrip)
        pure nothrow if (isSomeString!S) {
    S result;
    foreach (c; s) {
        if (!mustStrip(c))
            result ~= c;
    }
    return result;
}

void main() {
    import std.stdio, std.uni;
    auto s = "\u0000\u000A abc\u00E9def\u007F";
    writeln(s.stripChars( &isControl ));
    writeln(s.stripChars( c => isControl(c) || c == '\u007F' ));
    writeln(s.stripChars( c => isControl(c) || c >= '\u007F' ));
}</syntaxhighlight>
{{out}}
<pre> abcédef�
 abcédef
 abcdef</pre>



=={{header|Delphi}}==
{{works with|Delphi|6.0}}
{{libheader|SysUtils,StdCtrls}}


<syntaxhighlight lang="Delphi">
{String pack with control and extened chars}

const TestStr ='N'+#$01 +'o'+#$02 +'w'+#$03 +' '+#$04 +'i'+#$05 +'s'+#$06 +' '+#$07 +'t'+#$08 +'h'+#$09 +'e'+#$0A +' '+#$0B +'t'+#$0C +'i'+#$0D +'m'+#$0E +'e'+#$0F +' '+#$10 +'f'+#$11 +'o'+#$12 +'r'+#$13 +' '+#$14 +'a'+#$15 +'l'+#$16 +'l'+#$17 +' '+#$18 +'g'+#$19 +'o'+#$1A +'o'+#$1B +'d'+#$1C +' '+#$1D +'m'+#$1E +'e'+#$1F +'n'+#$80 +' '+#$81 +'t'+#$82 +'o'+#$83 +' '+#$84 +'c'+#$85 +'o'+#$86 +'m'+#$87 +'e'+#$88 +' '+#$89 +'t'+#$8A +'o'+#$8B +' '+#$8C +'t'+#$8D +'h'+#$8E +'e'+#$8F +' '+#$90 +'a'+#$91 +'i'+#$92 +'d'+#$93 +' '+#$94 +'o'+#$95 +'f'+#$96 +' '+#$97 +'t'+#$98 +'h'+#$99 +'e'+#$9A +' '+#$9B +'p'+#$9C +'a'+#$9D +'r'+#$9E +'t'+#$9F +'y'+#$A0;

function StripControls(S: string): string;
{Strip control characters from string}
var I: integer;
begin
Result:='';
for I:=1 to Length(S) do
 if byte(S[I])>=$20 then Result:=Result+S[I];
end;

function StripExtended(S: string): string;
{Strip extended characters from string}
var I: integer;
begin
Result:='';
for I:=1 to Length(S) do
 if byte(S[I])<$80 then Result:=Result+S[I];
end;


procedure StripString(Memo: TMemo);
begin
Memo.Lines.Add('String full of controls and extended chars: ');
Memo.Lines.Add(TestStr);
Memo.Lines.Add('String stripped of controls chars: ');
Memo.Lines.Add(StripControls(TestStr));
Memo.Lines.Add('String stripped of extended chars: ');
Memo.Lines.Add(StripExtended(TestStr));
Memo.Lines.Add('String stripped of both control and extended chars: ');
Memo.Lines.Add(StripControls(StripExtended(TestStr)));
end;


</syntaxhighlight>
{{out}}
<pre>
String full of controls and extended chars: 
N�o�w� �i�s� �t�h	e
 �t�i
m�e� �f�o�r� �a�l�l� �g�o�o�d� �m�e�n€ t‚oƒ „c…o†m‡eˆ ‰tŠo‹ ŒthŽe a‘i’d“ ”o•f– —t˜h™eš ›pœaržtŸy 
String stripped of controls chars: 
Now is the time for all good men€ t‚oƒ „c…o†m‡eˆ ‰tŠo‹ ŒthŽe a‘i’d“ ”o•f– —t˜h™eš ›pœaržtŸy 
String stripped of extended chars: 
N�o�w� �i�s� �t�h	e
 �t�i
m�e� �f�o�r� �a�l�l� �g�o�o�d� �m�e�n to come to the aid of the party
String stripped of both control and extended chars: 
Now is the time for all good men to come to the aid of the party
Elapsed Time: 51.012 ms.

</pre>


=={{header|EasyLang}}==

<syntaxhighlight lang=easylang>
func$ strip s$ .
   for c$ in strchars s$
      if strcode c$ >= 32 and strcode c$ <= 126
         r$ &= c$
      .
   .
   return r$
.
print strip "\tHellö world"
</syntaxhighlight>

=={{header|Erlang}}==
Exported functions to be used by [[Update_a_configuration_file]]
<syntaxhighlight lang="erlang">
-module( strip_control_codes ).

-export( [is_not_control_code/1, is_not_control_code_nor_extended_character/1, task/0] ).

is_not_control_code( C ) when C > 127 -> true;
is_not_control_code( C ) when C < 32; C =:= 127 -> false;
is_not_control_code( _C ) -> true.

is_not_control_code_nor_extended_character( C ) when C > 127 -> false;
is_not_control_code_nor_extended_character( C )	-> is_not_control_code( C ).

task() ->
    String = lists:seq( 0, 255 ),
    io:fwrite( "String (~p characters): ~s~n", [erlang:length(String), String] ),
    String_without_cc = lists:filter( fun is_not_control_code/1, String ),
    io:fwrite( "String without control codes (~p characters): ~s~n", [erlang:length(String_without_cc), String_without_cc] ),
    String_without_cc_nor_ec = lists:filter( fun is_not_control_code_nor_extended_character/1, String ),
    io:fwrite( "String without control codes nor extended characters (~p characters): ~s~n", [erlang:length(String_without_cc_nor_ec), String_without_cc_nor_ec] ).
</syntaxhighlight>
{{out}}
<pre>
41> strip_control_codes:task().
String (256 characters): ^@^A^B^C^D^E^F^G^H     
^N^O^P^Q^R^S^T^U^V^W^X^Y^Z^[^\^]^^^_ !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~^�������������������������������� ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ
String without control codes (223 characters):  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~�������������������������������� ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ
String without control codes nor extended characters (95 characters):  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
</pre>

=={{header|F Sharp|F#}}==
Uses test string from REXX.
<syntaxhighlight lang="fsharp">
open System

let stripControl (arg:string) = 
    String(Array.filter (fun x -> not (Char.IsControl(x))) (arg.ToCharArray()))
//end stripControl

let stripExtended (arg:string) = 
    let numArr = Array.map (fun (x:char) -> Convert.ToUInt16(x)) (arg.ToCharArray()) in
    String([|for num in numArr do if num >= 32us && num <= 126us then yield Convert.ToChar(num) |])
//end stripExtended

[<EntryPoint>]
let main args = 
    let test = "string of ☺☻♥♦⌂, may include control characters and other ilk.♫☼§►↔◄"
    printfn "Original: %s" test
    printfn "Stripped of controls: %s" (stripControl test)
    printfn "Stripped of extended: %s" (stripExtended test)
    0//main must return integer, much like in C/C++
</syntaxhighlight>
Output:
<pre>
Original: string of ☺☻♥♦�, may include control characters and other ilk.♫☼§►↔◄
Stripped of controls: string of ☺☻♥♦�, may include control characters and other ilk.♫☼§►↔◄
Stripped of extended: string of , may include control characters and other ilk.
</pre>

=={{header|Factor}}==
<syntaxhighlight lang="text">USING: ascii kernel sequences ;

: strip-control-codes ( str -- str' ) [ control? not ] filter ;

: strip-control-codes-and-extended ( str -- str' )
    strip-control-codes [ ascii? ] filter ;</syntaxhighlight>

=={{header|Forth}}==
<syntaxhighlight lang="forth">: strip ( buf len -- buf len' )  \ repacks buffer, so len' <= len
  over + over swap over ( buf dst limit src )
  do
    i c@ 32 127 within if
      i c@ over c! char+
    then
  loop
  over - ;</syntaxhighlight>

=={{header|Fortran}}==
<syntaxhighlight lang="fortran">module stripcharacters
implicit none

contains

  pure logical function not_control(ch)
    character, intent(in) :: ch
    not_control = iachar(ch) >= 32 .and. iachar(ch) /= 127
  end function not_control

  pure logical function not_extended(ch)
    character, intent(in) :: ch
    not_extended = iachar(ch) >= 32 .and. iachar(ch) < 127
  end function not_extended

  pure function strip(string,accept) result(str)
    character(len=*), intent(in) :: string
    character(len=len(string))   :: str
    interface
      pure logical function accept(ch)
        character, intent(in) :: ch
      end function except
    end interface
    integer :: i,n
    str = repeat(' ',len(string))
    n = 0
    do i=1,len(string)
      if ( accept(string(i:i)) ) then
        n = n+1
        str(n:n) = string(i:i)
      end if
    end do
  end function strip

end module stripcharacters


program test
  use stripcharacters
  
  character(len=256) :: string, str
  integer            :: ascii(256), i
  forall (i=0:255) ascii(i) = i
  forall (i=1:len(string)) string(i:i) = achar(ascii(i))
  write (*,*) string
  
  write (*,*) 'Control characters deleted:'
  str = strip(string,not_control)
  write (*,*) str

  forall (i=1:len(string)) string(i:i) = achar(ascii(i))
  write (*,*) 'Extended characters deleted:'
  write (*,*) strip(string,not_extended)
end program test
</syntaxhighlight>

=={{header|FreeBASIC}}==
<syntaxhighlight lang="freebasic">' FB 1.05.0 Win64

Function stripControlChars(s As Const String) As String
  If s = "" Then Return ""
  Dim count As Integer = 0
  Dim strip(0 To Len(s) - 1) As Boolean
  For i As Integer = 0 To Len(s) - 1
    For j As Integer = 0 To 31
      If s[i] = j OrElse s[i] = 127 Then 
        count += 1
        strip(i) = True
        Exit For 
      End If
    Next j
  Next i

  Dim buffer As String = Space(Len(s) - count)
  count  = 0  
  For i As Integer = 0 To Len(s) - 1
    If Not Strip(i) Then
      buffer[count] = s[i]
      count += 1
    End If
  Next
  Return buffer
End Function

Function stripExtendedChars(s As Const String) As String
  If s = "" Then Return ""
  Dim count As Integer = 0
  Dim strip(0 To Len(s) - 1) As Boolean
  For i As Integer = 0 To Len(s) - 1
    For j As Integer = 128 To 255
      If s[i] = j Then 
        count += 1
        strip(i) = True
        Exit For 
      End If
    Next j
  Next i

  Dim buffer As String = Space(Len(s) - count)
  count  = 0  
  For i As Integer = 0 To Len(s) - 1
    If Not Strip(i) Then
      buffer[count] = s[i]
      count += 1
    End If
  Next
  Return buffer
End Function

Dim s  As String = !"\v\001The\t quick\255 \vbrown\127\f fox\156" 
Dim s1 As String = stripControlChars(s)
Dim s2 As String = stripExtendedChars(s)
Dim s3 As String = stripExtendedChars(s1)

' Under Windows console, code page 850 :
' "vertical tab" displays as ♂
' "form feed" displays as ♀ 
' Chr(1) displays as ☺
' Chr(127) displays as ⌂
' the other control characters do what it says on the tin 
' Chr(156) displays as £
' Chr(255) displays as space
 
Print "Before stripping   :" , s
Print "Ctl chars stripped :" , s1
Print "Ext chars stripped :" , s2
Print "Both sets stripped :" , s3
Print
Print "Before stripping"   ,  "Length => " ; Len(s)
Print "Ctl chars stripped" ,  "Length => " ; Len(s1)
Print "Ext chars stripped" ,  "Length => " ; Len(s2)
Print "Both sets stripped" ,  "Length => " ; Len(s3)
Print
Print "Press any key to quit"
Sleep</syntaxhighlight>

{{out}}
<pre>
Before stripping   :        ♂☺The        quick  ♂brown⌂♀ fox£
Ctl chars stripped :        The quick  brown fox£
Ext chars stripped :        ♂☺The        quick ♂brown⌂♀ fox
Both sets stripped :        The quick brown fox

Before stripping            Length =>  27
Ctl chars stripped          Length =>  21
Ext chars stripped          Length =>  25
Both sets stripped          Length =>  19
</pre>

=={{header|Frink}}==
<syntaxhighlight lang="frink">stripExtended[str] := str =~ %s/[^\u0020-\u007e]//g

stripControl[str]  := str =~ %s/[\u0000-\u001F\u007f]//g

println[stripExtended[char[0 to 127]]]
println[stripControl[char[0 to 127]]]</syntaxhighlight>
{{out}}
<pre>
 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
</pre>

=={{header|Gambas}}==
'''[https://gambas-playground.proko.eu/?gist=19db658a6c44cfb1f6f887ff53e549bb Click this link to run this code]'''
<syntaxhighlight lang="gambas">Public Sub Main()
Dim sString As String = "The\t \equick\n \fbrownfox \vcost £125.00 or €145.00 or $160.00 \bto \ncapture ©®" 
Dim sStd, sExtend As String
Dim siCount As Short

For siCount = 32 To 126
  sStd &= Chr(siCount)
Next

For siCount = 128 To 255
  sExtend &= Chr(siCount)
Next

Print "Original string: -\t" & sString & gb.NewLine
Print "No extended characters: -\t" & Check(sString, sStd)
sStd &= sExtend
Print "With extended characters: -\t" & Check(sString, sStd)

End
'________________________________________________________________
Public Sub Check(sString As String, sCheck As String) As String
Dim siCount As Short
Dim sResult As String

For siCount = 1 To Len(sString)
  If InStr(sCheck, Mid(sString, siCount, 1)) Then sResult &= Mid(sString, siCount, 1)
Next

Return sResult

End</syntaxhighlight>
Output:
<pre>
Original string: -      The      uick
 
brownfox ^Kcost £125.00 or €145.00 or $160.00to 
capture ©®

No extended characters: -       The quick brownfox cost 125.00 or 145.00 or $160.00 to capture 
With extended characters: -     The quick brownfox cost £125.00 or €145.00 or $160.00 to capture ©®
</pre>

=={{header|Go}}==
Go works for ASCII and non-ASCII systems.  The first pair of functions below interpret strings as byte strings, presumably useful for strings consisting of ASCII and 8-bit extended ASCII data.  The second pair of functions interpret strings as UTF-8.
<syntaxhighlight lang="go">package main

import (
	"golang.org/x/text/transform"
	"golang.org/x/text/unicode/norm"
	"fmt"
	"strings"
)

// two byte-oriented functions identical except for operator comparing c to 127.
func stripCtlFromBytes(str string) string {
	b := make([]byte, len(str))
	var bl int
	for i := 0; i < len(str); i++ {
		c := str[i]
		if c >= 32 && c != 127 {
			b[bl] = c
			bl++
		}
	}
	return string(b[:bl])
}

func stripCtlAndExtFromBytes(str string) string {
	b := make([]byte, len(str))
	var bl int
	for i := 0; i < len(str); i++ {
		c := str[i]
		if c >= 32 && c < 127 {
			b[bl] = c
			bl++
		}
	}
	return string(b[:bl])
}

// two UTF-8 functions identical except for operator comparing c to 127
func stripCtlFromUTF8(str string) string {
	return strings.Map(func(r rune) rune {
		if r >= 32 && r != 127 {
			return r
		}
		return -1
	}, str)
}

func stripCtlAndExtFromUTF8(str string) string {
	return strings.Map(func(r rune) rune {
		if r >= 32 && r < 127 {
			return r
		}
		return -1
	}, str)
}

// Advanced Unicode normalization and filtering,
// see http://blog.golang.org/normalization and
// http://godoc.org/golang.org/x/text/unicode/norm for more
// details.
func stripCtlAndExtFromUnicode(str string) string {
	isOk := func(r rune) bool {
		return r < 32 || r >= 127
	}
	// The isOk filter is such that there is no need to chain to norm.NFC
	t := transform.Chain(norm.NFKD, transform.RemoveFunc(isOk))
	// This Transformer could also trivially be applied as an io.Reader
	// or io.Writer filter to automatically do such filtering when reading
	// or writing data anywhere.
	str, _, _ = transform.String(t, str)
	return str
}

const src = "déjà vu" + // precomposed unicode
	"\n\000\037 \041\176\177\200\377\n" + // various boundary cases
	"as⃝df̅" // unicode combining characters

func main() {
	fmt.Println("source text:")
	fmt.Println(src)
	fmt.Println("\nas bytes, stripped of control codes:")
	fmt.Println(stripCtlFromBytes(src))
	fmt.Println("\nas bytes, stripped of control codes and extended characters:")
	fmt.Println(stripCtlAndExtFromBytes(src))
	fmt.Println("\nas UTF-8, stripped of control codes:")
	fmt.Println(stripCtlFromUTF8(src))
	fmt.Println("\nas UTF-8, stripped of control codes and extended characters:")
	fmt.Println(stripCtlAndExtFromUTF8(src))
	fmt.Println("\nas decomposed and stripped Unicode:")
	fmt.Println(stripCtlAndExtFromUnicode(src))
}</syntaxhighlight>
Output: (varies with display configuration)
<pre>
source text:
déjà vu
� !~���
as⃝df̅ 

as bytes, stripped of control codes:
déjà vu !~��as⃝df̅ 

as bytes, stripped of control codes and extended characters:
dj vu !~asdf 

as UTF-8, stripped of control codes:
déjà vu !~��as⃝df̅ 

as UTF-8, stripped of control codes and extended characters:
dj vu !~asdf

as decomposed and stripped Unicode:
deja vu !~asdf
</pre>

=={{header|Groovy}}==
<syntaxhighlight lang="groovy">def stripControl = { it.replaceAll(/\p{Cntrl}/, '') }
def stripControlAndExtended = { it.replaceAll(/[^\p{Print}]/, '') }</syntaxhighlight>
Test:
<syntaxhighlight lang="groovy">def text = (0..255).collect { (char) it }.join('')
def textMinusControl = text.findAll { int v = (char)it; v > 31 && v != 127 }.join('')
def textMinusControlAndExtended = textMinusControl.findAll {((char)it) < 128 }.join('')

assert stripControl(text) == textMinusControl
assert stripControlAndExtended(text) == textMinusControlAndExtended</syntaxhighlight>

=={{header|Haskell}}==
<syntaxhighlight lang="haskell">import Control.Applicative (liftA2)

strip, strip2 :: String -> String
strip = filter (liftA2 (&&) (> 31) (< 126) . fromEnum)

-- or
strip2 = filter (((&&) <$> (> 31) <*> (< 126)) . fromEnum)

main :: IO ()
main =
  (putStrLn . unlines) $
  [strip, strip2] <*> ["alphabetic 字母 with some less parochial parts"]</syntaxhighlight>
{{Out}}
<pre>alphabetic  with some less parochial parts
alphabetic  with some less parochial parts</pre>

=={{header|Icon}} and {{header|Unicon}}==
We'll use ''deletec'' to remove unwanted characters (2nd argument) from a string (1st argument).  The procedure below coerces types back and forth between string and cset.  The character set of unwanted characters is the difference of all ASCII characters and the ASCII characters from 33 to 126.
<syntaxhighlight lang="icon">procedure main(A)
write(image(deletec(&ascii,&ascii--(&ascii)[33:127]))) 
end
link strings
</syntaxhighlight>

{{libheader|Icon Programming Library}}  
[http://www.cs.arizona.edu/icon/library/src/procs/strings.icn strings.icn provides deletec] 

The IPL procedure ''deletec'' is equivalent to this:
<syntaxhighlight lang="icon">procedure deletec(s, c)			#: delete characters
   result := ""
   s ? {
      while  result ||:= tab(upto(c)) do tab(many(c))
      return result ||:= tab(0)
      }
end</syntaxhighlight>


Output:<pre>" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}"</pre>

=={{header|J}}==
'''Solution:'''
<syntaxhighlight lang="j">stripControlCodes=: -.&(DEL,32{.a.)
stripControlExtCodes=: ([ -. -.)&(32}.127{.a.)</syntaxhighlight>
'''Usage:'''
<syntaxhighlight lang="j">   mystring=: a. {~ ?~256        NB. ascii chars 0-255 in random order
   #mystring                       NB. length of string
256
   #stripControlCodes mystring     NB. length of string without control codes
223
   #stripControlExtCodes mystring  NB. length of string without control codes or extended chars
95
   #myunicodestring=: u: ?~1000     NB. unicode characters 0-999 in random order
1000
   #stripControlCodes myunicodestring
967
   #stripControlExtCodes myunicodestring
95
   stripControlExtCodes myunicodestring
k}w:]U3xEh9"GZdr/#^B.Sn%\uFOo[(`t2-J6*IA=Vf&N;lQ8,${XLz5?D0~s)'Y7Kq|ip4<WRCaM!b@cgv_T +mH>1ejPy</syntaxhighlight>

Generally speaking, <code>([-.-.)</code> gives us the contents from the sequence on the left, restricted to only the items which appear in the sequence on the right.

[[Category:String manipulation]]

=={{header|Java}}==
{{works with|Java|8+}}
<syntaxhighlight lang="java">import java.util.function.IntPredicate;

public class StripControlCodes {

    public static void main(String[] args) {
        String s = "\u0000\n abc\u00E9def\u007F";
        System.out.println(stripChars(s, c -> c > '\u001F' && c != '\u007F'));
        System.out.println(stripChars(s, c -> c > '\u001F' && c < '\u007F'));
    }

    static String stripChars(String s, IntPredicate include) {
        return s.codePoints().filter(include::test).collect(StringBuilder::new,
                StringBuilder::appendCodePoint, StringBuilder::append).toString();
    }
}</syntaxhighlight>
<pre> abcédef
 abcdef</pre>

=={{header|JavaScript}}==

===ES 5===

<syntaxhighlight lang="javascript">(function (strTest) {

    // s -> s
    function strip(s) {
        return s.split('').filter(function (x) {
            var n = x.charCodeAt(0);
            
            return 31 < n && 127 > n;
        }).join('');
    }

    return strip(strTest);

})("\ba\x00b\n\rc\fd\xc3");</syntaxhighlight>

{{Out}}

<syntaxhighlight lang="javascript">"abcd"</syntaxhighlight>

=={{header|jq}}==
{{works with|jq|1.4}}
<syntaxhighlight lang="jq">def strip_control_codes:
 explode | map(select(. > 31 and . != 127)) | implode;

def strip_extended_characters:
  explode | map(select(31 < . and . < 127)) | implode;</syntaxhighlight>

'''Example''':
<syntaxhighlight lang="jq">def string: "string of ☺☻♥♦⌂, may include control characters such as null(\u0000) and other ilk.\n§►↔◄\nRødgrød med fløde";

"string | strip_control_codes\n => \(string | strip_control_codes)",
"string | strip_extended_characters\n => \(string | strip_extended_characters)"</syntaxhighlight>
{{out}}
<syntaxhighlight lang="sh">$ jq -n -r -f Strip_control_codes_and_extended_characters.jq
string | strip_control_codes
 => string of ☺☻♥♦⌂, may include control characters such as null() and other ilk.§►↔◄Rødgrød med fløde
string | strip_extended_characters
 => string of , may include control characters such as null() and other ilk.Rdgrd med flde</syntaxhighlight>

=={{header|Julia}}==
<syntaxhighlight lang="julia">
stripc0{T<:String}(a::T) = replace(a, r"[\x00-\x1f\x7f]", "")
stripc0x{T<:String}(a::T) = replace(a, r"[^\x20-\x7e]", "")

a = "a\n\tb\u2102d\u2147f"

println("Original String:\n    ", a)
println("\nWith C0 control characters removed:\n    ", stripc0(a))
println("\nWith C0 and extended characters removed:\n    ", stripc0x(a))
</syntaxhighlight>

{{out}}
<pre>
Original String:
    a
        bℂdⅇf

With C0 control characters removed:
    abℂdⅇf

With C0 and extended characters removed:
    abdf
</pre>

=={{header|Kotlin}}==
<syntaxhighlight lang="scala">// version 1.1.2

fun String.strip(extendedChars: Boolean = false): String {
    val sb = StringBuilder()
    for (c in this) {
        val i = c.toInt()
        if (i in 32..126 || (!extendedChars && i >= 128)) sb.append(c)
    }
    return sb.toString()
}

fun main(args: Array<String>) {
    println("Originally:")
    val s = "123\tabc\u0007DEF\u007F+-*/€æŧðłþ"
    println("String = $s  Length = ${s.length}")
    println("\nAfter stripping control characters:")
    val t = s.strip()
    println("String = $t  Length = ${t.length}")
    println("\nAfter stripping control and extended characters:")
    val u = s.strip(true)
    println("String = $u  Length = ${u.length}")
}</syntaxhighlight>

{{out}}
<pre>
Originally:
String = 123	abcDEF�+-*/€æŧðłþ  Length = 22

After stripping control characters:
String = 123abcDEF+-*/€æŧðłþ  Length = 19

After stripping control and extended characters:
String = 123abcDEF+-*/  Length = 13
</pre>

=={{header|langur}}==
<syntaxhighlight lang="langur">val .str = "()\x15abcd\uFFFF123\uBBBB!@#$%^&*\x01"

writeln "original          : ", .str
writeln "without ctrl chars: ", replace(.str, RE/\p{Cc}/, "")
writeln "print ASCII only  : ", replace(.str, re/[^ -~]/, "")</syntaxhighlight>

{{out}}
<pre>original          : ()�abcd�123뮻!@#$%^&*�
without ctrl chars: ()abcd�123뮻!@#$%^&*
print ASCII only  : ()abcd123!@#$%^&*</pre>

=={{header|Liberty BASIC}}==
<syntaxhighlight lang="lb">
    all$ =""
    for i =0 to 255
        all$ =all$ +chr$( i)
    next i

    print "Original string of bytes.  ( chr$( 10) causes a CRLF.)"
    print all$
    print

    lessControl$ =controlStripped$( all$)
    print "With control codes stripped out."
    print lessControl$
    print

    lessExtendedAndControl$ =extendedStripped$( lessControl$)
    print "With extended codes stripped out too."
    print lessExtendedAndControl$

    end

    function controlStripped$( i$)
        r$ =""
        for j =1 to len( i$)
            ch$ =mid$( i$, j, 1)
            if asc( ch$) >=32 then r$ =r$ +ch$
        next j
        controlStripped$ =r$
    end function

    function extendedStripped$( i$)
        r$ =""
        for j =1 to len( i$)
            ch$ =mid$( i$, j, 1)
            if asc( ch$) <=128 then r$ =r$ +ch$
        next j
        extendedStripped$ =r$
    end function
</syntaxhighlight>

=={{header|Lua}}==
<syntaxhighlight lang="lua">function Strip_Control_Codes( str )
    local s = ""
    for i in str:gmatch( "%C+" ) do
 	s = s .. i
    end
    return s
end

function Strip_Control_and_Extended_Codes( str )
    local s = ""
    for i = 1, str:len() do
	if str:byte(i) >= 32 and str:byte(i) <= 126 then
  	    s = s .. str:sub(i,i)
	end
    end
    return s
end

q = ""
for i = 0, 255 do
	q = q .. string.char(i)
end

print( Strip_Control_Codes(q) )
print( Strip_Control_and_Extended_Codes(q) )</syntaxhighlight>
<pre> !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~€�‚ƒ„…†‡ˆ‰Š‹Œ�Ž��‘’“”•–—˜™š›œ�žŸ ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ
 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~</pre>

=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="mathematica">stripCtrl[x_]:=StringJoin[Select[Characters[x],
MemberQ[CharacterRange["!","~"]~Join~Characters[FromCharacterCode[Range[128,255]]],#]&]]

stripCtrlExt[x_]:=StringJoin[Select[Characters[x],
MemberQ[CharacterRange["!","~"],#]&]]</syntaxhighlight>

Test:
<pre>CompleteSet=FromCharacterCode[Range[0,255]]
->\.00\.02\.03\.04\.05\.06\.07\.08\.0b\.0e\.0f\.10\.11\.12\.13\.14
\.15\.16\.17\.18\.19\.1a\[RawEscape]\.1c\.1d\.1e\.1f !"#$%&'()*+,-./
0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]
^_`abcdefghijklmnopqrstuvwxyz{|}~��������������������������������� ¡¢£¤¥¦§¨©ª«\[Not]®¯\[Degree]
\[PlusMinus]\.b2\.b3\.b4\[Micro]\[Paragraph]\[CenterDot]¸¹º»¼½¾¿
ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ*ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö/øùúûüýþÿ

stripCtrl[CompleteSet]
->!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]
^_`abcdefghijklmnopqrstuvwxyz{|}~�������������������������������� ¡¢£¤¥¦§¨©ª«\[Not]®¯\[Degree]
\[PlusMinus]\.b2\.b3\.b4\[Micro]\[Paragraph]\[CenterDot]
¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ*ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö
/øùúûüýþÿ

stripCtrlExt[CompleteSet]
->!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]
^_`abcdefghijklmnopqrstuvwxyz{|}~</pre>

=={{header|MATLAB}} / {{header|Octave}}==

<syntaxhighlight lang="matlab"> function str = stripped(str)
    str = str(31<str & str<127); 
  end; </syntaxhighlight>

=={{header|Nim}}==
<syntaxhighlight lang="nim">proc stripped(str: string): string =
  result = ""
  for c in str:
    if ord(c) in 32..126:
      result.add c

proc strippedControl(str: string): string =
  result = ""
  for c in str:
    if ord(c) in {32..126, 128..255}:
      result.add c

echo strippedControl "\ba\x00b\n\rc\fdÄ"
echo stripped "\ba\x00b\n\rc\fd\xc3"</syntaxhighlight>
Output:
<pre>abcdÄ
abcd</pre>

=={{header|OCaml}}==

<syntaxhighlight lang="ocaml">let is_control_code c =
  c < '\032' || c = '\127'

let is_extended_char c =
  c > '\127'

let strip f str =
  let len = String.length str in
  let res = Bytes.create len in
  let rec aux i j =
    if i >= len
    then Bytes.sub_string res 0 j
    else if f str.[i]
    then aux (succ i) j
    else begin
      Bytes.set res j str.[i];
      aux (succ i) (succ j)
    end
  in
  aux 0 0

let () =
  Random.self_init ();
  let len = 32 in
  let s =
    String.init len (fun _ ->
      char_of_int (Random.int 256))
  in
  print_endline (strip is_control_code s);
  print_endline (strip (fun c -> is_control_code c || is_extended_char c) s)</syntaxhighlight>

=={{header|Pascal}}==
{{works with|Free_Pascal}}
<syntaxhighlight lang="pascal">program StripCharacters(output);

function Strip (s: string; control, extended: boolean): string;
  var
    index: integer;
  begin
    Strip := '';
    for index:= 1 to length(s) do
    if not ((control and (ord(s[index]) <= 32)) or (extended and (ord(s[index]) > 127))) then
      Strip := Strip + s[index];
  end;

var
  test: string;
  i: integer;

begin
  setlength(test, 40);
  randomize;
  for i := 1 to length(test) do
    test[i] := char(1 + random(255));
  writeln ('Original: ', test);
  writeln ('No CNTL:  ', Strip(test, true,  false));
  writeln ('No extnd: ', Strip(test, false, true));
  writeln ('ASCII:    ', Strip(test, true,  true));
end.</syntaxhighlight>
Output:
<pre>% ./StripCharacters 
Original: )?z8i9?a?K??N?s?F˪w?a??s
                                  #?b?B}PT?ٜ
No CNTL:  )?z8i9?a?K??N?s?F˪w?a??s#?b?B}PT?ٜ
No extnd: )z8i9aKNsFwas
                       #bB}PT
ASCII:    )z8i9aKNsFwas#bB}PT
</pre>

=={{header|Peloton}}==
Peloton has a native instruction for removing control codes from a string, SAL, the Low ASCII Strip. From the manual:
<syntaxhighlight lang="sgml">Create variable with control characters: <@ SAYLETVARLIT>i|This string has control characters 
	-	-	-	-	-	-

in it</@>
Strip control characters <@ SAYSALVAR>i</@>
Assign infix <@ LETVARSALVAR>j|i</@> <@ SAYVAR>j</@>
Assign prepend <@ LETSALVARVAR>k|i</@> <@ SAYVAR>k</@>
Reflexive assign <@ ACTSALVAR>i</@> <@ SAYVAR>i</@></syntaxhighlight>

Peloton also has SAH, High ASCII Strip. Again, from the manual:
<syntaxhighlight lang="sgml">Create variable with high and low ANSI: <@ SAYLETVARLIT>i|This string has both low ansi and high ansi characters - il doit d'être prévenu</@>
Strip high  ANSI <@ SAYSAHVAR>i</@>
Assign infix <@ LETVARSAHVAR>j|i</@> <@ SAYVAR>j</@>
Assign prepend <@ LETSAHVARVAR>k|i</@> <@ SAYVAR>k</@>
Reflexive assign <@ ACTSAHVAR>i</@> <@ SAYVAR>i</@></syntaxhighlight>

=={{header|Perl}}==
<syntaxhighlight lang="perl">#!/usr/bin/perl -w 
use strict ;

my @letters ;
my @nocontrols ;
my @noextended ;
for ( 1..40 ) {
   push @letters ,  int( rand( 256 ) ) ;
}
print "before sanitation : " ;
print join( '' , map { chr( $_ ) } @letters ) ;
print "\n" ;
@nocontrols = grep { $_ > 32 && $_ != 127 } @letters ;
print "Without controls: " ; 
print join( '' , map { chr( $_ ) } @nocontrols ) ;
@noextended = grep { $_ < 127 } @nocontrols ;
print "\nWithout extended: " ;
print join( '' , map { chr( $_ ) } @noextended ) ;
print "\n" ;</syntaxhighlight>
Output:
<PRE>before sanitation : �L08&YH�O��n)�:���O�G$���.���"zO���Q�?��
Without controls: �L08&YH�O��n)�:�O�G$���.���"zO��Q�?��
Without extended: L08&YHOn):OG$."zOQ?
</PRE>

=={{header|Phix}}==
{{trans|Ada}}
While you can delete a character from a string using say s[i..i] = "", the fastest and easiest way is always just
to build a new one character-by-character.<br>
I credited Ada solely for the sensible fromch / toch / abovech idea.
<!--<syntaxhighlight lang="phix">(phixonline)-->
 <span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 <span style="color: #7060A8;">requires</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"1.0.2"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (param default fixes in pwa/p2js)</span>
 <span style="color: #008080;">function</span> <span style="color: #000000;">filter_it</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">fromch</span><span style="color: #0000FF;">=</span><span style="color: #008000;">' '</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">toch</span><span style="color: #0000FF;">=</span><span style="color: #000000;">#7E</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">abovech</span><span style="color: #0000FF;">=</span><span style="color: #000000;">#7F</span><span style="color: #0000FF;">)</span>
     <span style="color: #004080;">string</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span>
     <span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
         <span style="color: #004080;">integer</span> <span style="color: #000000;">ch</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span>
         <span style="color: #008080;">if</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">fromch</span> <span style="color: #008080;">and</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">ch</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">toch</span> <span style="color: #008080;">or</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;">></span><span style="color: #000000;">abovech</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
             <span style="color: #000000;">res</span> <span style="color: #0000FF;">&=</span> <span style="color: #000000;">ch</span>
         <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
     <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
     <span style="color: #008080;">return</span> <span style="color: #000000;">res</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
  
 <span style="color: #008080;">procedure</span> <span style="color: #000000;">put_line</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
     <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%s \"%s\", Length:%d\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">text</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)})</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
  
 <span style="color: #004080;">string</span> <span style="color: #000000;">full</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"\u0000 abc\u00E9def\u007F"</span>
 
 <span style="color: #000000;">put_line</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"The full string:"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">full</span><span style="color: #0000FF;">)</span>
 <span style="color: #000000;">put_line</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"No Control Chars:"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">filter_it</span><span style="color: #0000FF;">(</span><span style="color: #000000;">full</span><span style="color: #0000FF;">))</span> <span style="color: #000080;font-style:italic;">-- default values for fromch, toch, and abovech</span>
 <span style="color: #000000;">put_line</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"\" and no Extended:"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">filter_it</span><span style="color: #0000FF;">(</span><span style="color: #000000;">full</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">abovech</span><span style="color: #0000FF;">:=</span><span style="color: #000000;">#FF</span><span style="color: #0000FF;">))</span> <span style="color: #000080;font-style:italic;">-- defaults for fromch and toch</span>
<!--</syntaxhighlight>-->
{{out}}
(desktop/Phix, in a grubby Windows console)
<pre>
The full string: "  abc+®def�", Length:11
No Control Chars: " abc+®def", Length:9
" and no Extended: " abcdef", Length:7
</pre>
(pwa/p2js)
<pre>
The full string: " abcédef�", Length:10
No Control Chars: " abcédef", Length:8
" and no Extended: " abcdef", Length:7
</pre>
The reason is that JavaScript handles unicode slightly differently. On desktop/Phix, \u0000 is treated as the single ''byte'' #00, and
likewise \u007F as the single byte #7F, but \u00E9 is converted to the utf-8 sequence #C3,#A9 - hence the disagreement over the initial and middle lengths. For proper compatibility you would have to start playing with utf8_to_utf32() and friends. Also as you can see the grubby Windows console does not display utf8 nicely, so we get an ugly "+®" for what should be a single \u00E9 character. You should get slightly better results on a Linux console, and maybe if you have more fonts installed on Windows than I do, things might look better with a different one, plus of course the text is far more likely to display correctly in a GUI, but that's a bit beyond the remit of this simple task I fear.

=={{header|PicoLisp}}==
Control characters in strings are written with a hat (^) in PicoLisp. ^? is the DEL character.
<syntaxhighlight lang="picolisp">(de stripCtrl (Str)
   (pack
      (filter
         '((C)
            (nor (= "^?" C) (> " " C "^A")) )
         (chop Str) ) ) )

(de stripCtrlExt (Str)
   (pack
      (filter
         '((C) (> "^?" C "^_"))
         (chop Str) ) ) )</syntaxhighlight>
Test:
<pre>: (char "^?")
-> 127

: (char "^_")
-> 31

: (stripCtrl "^I^M a b c^? d äöüß")
-> " a b c d äöüß"

: (stripCtrlExt "^I^M a b c^? d äöüß")
-> " a b c d "</pre>

=={{header|Pike}}==
<syntaxhighlight lang="pike">> string input = random_string(100);
> (string)((array)input-enumerate(32)-enumerate(255-126,1,127));
Result: "p_xx08M]cK<FHgR3\\I.x>)Tm<VgakYddy&P7"</syntaxhighlight>

=={{header|PL/I}}==
<syntaxhighlight lang="pl/i">
stripper: proc options (main);
   declare s character (100) varying;
   declare i fixed binary;

   s = 'the quick brown fox jumped';
   /* A loop to replace blanks with control characters */
   do i = 1 to length(s);
      if substr(s, i, 1) = ' ' then
         substr(s, i, 1) = '01'x;
   end;
   put skip list (s);

   call stripcc (s);
   put skip list (s);

   s = 'now is the time for all good men';
   /* A loop to replace blanks with control characters */
   do i = 1 to length(s);
      if substr(s, i, 1) = ' ' then
         substr(s, i, 1) = 'A1'x;
   end;
   put skip list (s);

   call stripex (s);
   put skip list (s);

/* Strip control codes. */
stripcc: procedure (s);
   declare s character (*) varying;
   declare w character (length(s));
   declare c character (1);
   declare (i, j) fixed binary;

   j = 0;
   do i = 1 to length (s);
      c = substr(s, i, 1);
      if unspec(c) >= '00100000'b | unspec(c) = '01111111'b then
         do;
            j = j + 1;
            substr(w, j, 1) = c;
         end;
   end;
   s = substr(w, 1, j);
end stripcc;

/* Strips control codes and extended characters. */
stripex: procedure (s);
   declare s character (*) varying;
   declare w character (length(s));
   declare c character (1);
   declare (i, j) fixed binary;

   j = 0;
   do i = 1 to length (s);
      c = substr(s, i, 1);
      if unspec(c) >= '00100000'b & unspec(c) < '01111111'b then
         do;
            j = j + 1;
            substr(w, j, 1) = c;
         end;
   end;
   s = substr(w, 1, j);
end stripex;

end stripper;
</syntaxhighlight>
Output:
<pre>
the�quick�brown�fox�jumped 
thequickbrownfoxjumped 
now¡is¡the¡time¡for¡all¡good¡men 
nowisthetimeforallgoodmen 
</pre>

=={{header|PowerShell}}==
<syntaxhighlight lang="powershell">
function Remove-Character
{
    [CmdletBinding(DefaultParameterSetName="Control and Extended")]
    [OutputType([string])]
    Param
    (
        [Parameter(Mandatory=$true,
                   ValueFromPipeline=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=0)]
        [string]
        $String,

        [Parameter(ParameterSetName="Control")]
        [switch]
        $Control,

        [Parameter(ParameterSetName="Extended")]
        [switch]
        $Extended
    )

    Begin
    {
        filter Remove-ControlCharacter
        {
            $_.ToCharArray() | ForEach-Object -Begin {$out = ""} -Process {if (-not [Char]::IsControl($_)) {$out += $_ }} -End {$out}
        }

        filter Remove-ExtendedCharacter
        {
            $_.ToCharArray() | ForEach-Object -Begin {$out = ""} -Process {if ([int]$_ -lt 127) {$out += $_ }} -End {$out}
        }
    }
    Process
    {
        foreach ($s in $String)
        {
            switch ($PSCmdlet.ParameterSetName)
            {
                "Control"  {$s | Remove-ControlCharacter}
                "Extended" {$s | Remove-ExtendedCharacter}
                Default    {$s | Remove-ExtendedCharacter | Remove-ControlCharacter}
            }
        }
    }
}
</syntaxhighlight>

<syntaxhighlight lang="powershell">
$test = "$([char]9)Français."

"Original string              : `"$test`""
"Control characters stripped  : `"$($test | Remove-Character -Control)`""
"Extended characters stripped : `"$($test | Remove-Character -Extended)`""
"Control & extended stripped  : `"$($test | Remove-Character)`""
</syntaxhighlight>
{{Out}}
<pre>
Original string              : "	Français."
Control characters stripped  : "Français."
Extended characters stripped : "	Franais."
Control & extended stripped  : "Franais."
</pre>
<syntaxhighlight lang="powershell">
"Français", "Čeština" | Remove-Character -Extended
</syntaxhighlight>
{{Out}}
<pre>
Franais
etina
</pre>

=={{header|PureBasic}}==
<syntaxhighlight lang="purebasic">Procedure.s stripControlCodes(source.s)
  Protected i, *ptrChar.Character, length = Len(source), result.s
  *ptrChar = @source
  For i = 1 To length
    If *ptrChar\c > 31 
      result + Chr(*ptrChar\c)
    EndIf
    *ptrChar + SizeOf(Character)
  Next
  ProcedureReturn result 
EndProcedure

Procedure.s stripControlExtCodes(source.s)
  Protected i, *ptrChar.Character, length = Len(source), result.s
  *ptrChar = @source
  For i = 1 To length
    If *ptrChar\c > 31 And *ptrChar\c < 128
      result + Chr(*ptrChar\c)
    EndIf
    *ptrChar + SizeOf(Character)
  Next
  ProcedureReturn result 
EndProcedure

If OpenConsole()
  ;create sample string
  Define i, s.s
  For i = 1 To 80
    s + Chr(Random(254) + 1) ;include character values from 1 to 255
  Next 

  PrintN(stripControlCodes(s))    ;string without control codes 
  PrintN("---------")
  PrintN(stripControlExtCodes(s)) ;string without control codes or extended chars
  
  Print(#CRLF$ + #CRLF$ + "Press ENTER to exit"): Input()
  CloseConsole()
EndIf</syntaxhighlight>
Sample output:
<pre>»╫=┐C─≡G(═ç╤â√╝÷╔¬ÿ▌x  è4∞|)ï└⌐ƒ9²òτ┌ºáj)▓<~-vPÿφQ╨ù¿╖îFh"[ü╗dÉ₧q#óé├p╫■
---------
=CG(x 4|)9j)<~-vPQFh"[dq#p</pre>

=={{header|Python}}==
<syntaxhighlight lang="python">stripped = lambda s: "".join(i for i in s if 31 < ord(i) < 127)

print(stripped("\ba\x00b\n\rc\fd\xc3"))</syntaxhighlight>Output:<syntaxhighlight lang="text">abcd</syntaxhighlight>

=={{header|Racket}}==

<syntaxhighlight lang="racket">
#lang racket
;; Works on both strings (Unicode) and byte strings (raw/ASCII)
(define (strip-controls str)
  (regexp-replace* #rx"[\0-\037\177]+" str ""))
(define (strip-controls-and-extended str)
  (regexp-replace* #rx"[^\040-\176]+" str ""))
</syntaxhighlight>

=={{header|Raku}}==
(formerly Perl 6)
{{works with|Rakudo|2018.03}}

<syntaxhighlight lang="raku" line>my $str = (0..400).roll(80)».chr.join;

say $str;
say $str.subst(/<:Cc>/,      '', :g); # unicode property: control character
say $str.subst(/<-[\ ..~]>/, '', :g);</syntaxhighlight>
<pre>kşaNĹĭŗ�|Ęw���"ÄlĄWł8iCƁę��Ż�¬�5ĎĶ'óü¸'ÍŸ;ŢƐ¦�´ŷQċűÒŴ$ÃŅ�Đįð+=ĥƂ+Ōĭħ¼ŕc¤H~ìïēÕ
kşaNĹĭŗ|Ęw"ÄlĄWł8iCƁęŻ¬5ĎĶ'óü¸'ÍŸ;ŢƐ¦´ŷQċűÒŴ$ÃŅĐįð+=ĥƂ+Ōĭħ¼ŕc¤H~ìïēÕ
kaN|w"lW8iC5'';Q$+=+cH~</pre>

=={{header|REXX}}==
Note that &nbsp; ''guillemets'' &nbsp; were used as fences in presenting/displaying the &nbsp; «««before»»» &nbsp; and &nbsp; «««after»»» &nbsp; text strings.
===idiomatic version===
This REXX version processes each character in an idiomatic way &nbsp; (if it's a wanted character, then keep it).
<syntaxhighlight lang="rexx">/*REXX program strips all  "control codes"  from a character string  (ASCII or EBCDIC). */
z= 'string of ☺☻♥♦⌂, may include control characters and other    ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.'
@=' !"#$%&''()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~'
$=
   do j=1  for length(z);   _=substr(z, j, 1)    /*get a char from   X   one at a time. */
   if verify(_, @)==0  then $=$ || _             /*Is char in the @ list?   Then use it.*/
   end   /*j*/                                   /*stick a fork in it,  we're all done. */

say 'old = »»»'z"«««"                            /*add ««fence»» before & after old text*/
say 'new = »»»'$"«««"                            /* "      "        "   "   "   new   " */</syntaxhighlight>
{{out|output}}
<pre>
old = »»»string of ☺☻♥♦⌂, may include control characters and other    ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.«««
new = »»»string of , may include control characters and other    ilk.«««
</pre>

===faster version===
This REXX version only deletes unwanted characters. 

It also shows a different way of performing concatenations (without using abutments, &nbsp; and a way to split a long literal (character) string. 

Because there are &nbsp; (or should be) &nbsp; fewer unwanted characters than wanted characters, this version is faster.
<syntaxhighlight lang="rexx">/*REXX program strips all  "control codes"  from a character string  (ASCII or EBCDIC). */
x= 'string of ☺☻♥♦⌂, may include control characters and other    ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.'
@=' !"#$%&''()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghij' || ,
                                              'klmnopqrstuvwxyz{|}~'
$=x                                              /*set "new" string to same as the old. */
   do  until _=0;             _=verify($, @)     /*check if  any  character isn't in  @.*/
   if _\==0  then $=delstr($, _, 1)              /*Is this a bad char?   Then delete it.*/
   end   /*until*/                               /*stick a fork in it,  we're all done. */

say 'old = »»»' || x || "«««"                    /*add ««fence»» before & after old text*/
say 'new = »»»' || $ || "«««"                    /* "      "        "   "   "   new   " */</syntaxhighlight>
{{out|output|text=&nbsp; is identical to the 1<sup>st</sup> REXX version.}} <br><br>

=={{header|Ring}}==
<syntaxhighlight lang="ring">
s = char(31) + "abc" + char(13) + "def" + char(11) + "ghi" + char(10)
see strip(s) + nl
 
func strip str
strip = ""
for i = 1 to len(str)
    nr = substr(str,i,1)
    a = ascii(nr)
    if a > 31 and a < 123 and nr != "'" and nr != """"
       strip = strip + nr ok
next 
return strip
</syntaxhighlight>

=={{header|RPL}}==
RPL has a character set based on ASCII but does not support extended characters.
 ≪ → text
   ≪ "" 1 text SIZE '''FOR''' j
        text j DUP SUB NUM
        '''IF''' DUP 32 ≥ OVER 126 ≤ '''THEN''' CHR + '''ELSE''' DROP '''END'''
     '''NEXT'''
 ≫ ≫ '<span style="color:blue">NOCTRL</span>' STO

=={{header|Ruby}}==
<syntaxhighlight lang="ruby">class String
  def strip_control_characters()
    chars.each_with_object("") do |char, str|
      str << char unless char.ascii_only? and (char.ord < 32 or char.ord == 127)
    end
  end
  
  def strip_control_and_extended_characters()
    chars.each_with_object("") do |char, str|
      str << char if char.ascii_only? and char.ord.between?(32,126)
    end
  end
end

p s = "\ba\x00b\n\rc\fd\xc3\x7ffoo"
p s.strip_control_characters
p s.strip_control_and_extended_characters</syntaxhighlight>

{{out}}
<pre>"\ba\u0000b\n\rc\fd\xC3\u007Ffoo"
"abcd\xC3foo"
"abcdfoo"</pre>

=={{header|Run BASIC}}==
<syntaxhighlight lang="runbasic">s$ = chr$(31) + "abc" + chr$(13) + "def" + chr$(11) + "ghi" + chr$(10)
print strip$(s$)

' -----------------------------------------
' strip junk 
' -----------------------------------------
FUNCTION strip$(str$)
for i = 1 to len(str$)
  a$ = MID$(str$,i,1)
  a = ASC(a$)
  if a > 31 then
    if a <  123 then
      if a$ <> "'" then
        if a$ <> """" then
          strip$ = strip$ + a$
        end if
      end if
    end if
  end if
next i
END FUNCTION</syntaxhighlight>
<pre>
input  : chr$(31)+"abc"+chr$(13)+"def"+chr$(11)+"ghi"+chr$(10)
output : abcdefghi</pre>

=={{header|Scala}}==
===ASCII: Using StringOps Class===
<syntaxhighlight lang="scala">val controlCode : (Char) => Boolean = (c:Char) => (c <= 32 || c == 127)
val extendedCode : (Char) => Boolean = (c:Char) => (c <= 32 || c > 127)


// ASCII test...
val teststring = scala.util.Random.shuffle( (1.toChar to 254.toChar).toList ).mkString

println( "ctrl filtered out: \n\n" + 
  teststring.filterNot(controlCode) + "\n" )

println( "ctrl and extended filtered out: \n\n" + 
  teststring.filterNot(controlCode).filterNot(extendedCode) + "\n" )</syntaxhighlight>
{{out}}
<pre>ctrl filtered out:

?d2??6ú╖)ⁿ┼gEhW3RS⌠!a?┬╘├╢-ß?·▄╔B,_?╟│┤'C║j«?ΩcqJ╣²▀÷±?0s∩░uτ8Φ½&Σ¬y▓H?*?AL?═eDX??≥╚╧
4σ+r=Ñ¼╙U▌"?.⌐?≡K?k╥áF\?╕QΘ?╪Z?▐√╠?`M?7▒°G^≈@xz?>t:╦╨íw¿─┐]Io(V╡?P¡┴?º┌ΓO┘φ└╓~|#⌡π?}µ
╗l???$ó{n/╫mi╤<9f≤?∙»Nª;?1??εT?■╩%╒╛[╜p∞α╬vñ╞bYδ╝5█


ctrl and extended filtered out:

?d26)gEhW3RS!a-B,_'CjcqJ0su8&yH*ALeDX4+r=U".KkF
\QZ`M7G^@xz>t:w]Io(VPO~|#}l${n/mi<9fN;1T%[pvbY5
</pre>

===Unicode: Using Regular Expressions===
<syntaxhighlight lang="scala">//
// A Unicode test string
//
val ulist = 0x8232.toChar :: 0xFFF9.toChar :: 0x200E.toChar :: (1.toChar to 2000.toChar).toList
val ustring = scala.util.Random.shuffle( ulist ).mkString

// Remove control codes including private codes
val sNoCtrlCode = ustring.replaceAll("[\\p{C}]","")  

val htmlNoCtrlCode = for( i <- sNoCtrlCode.indices ) yield 
  "&#" + sNoCtrlCode(i).toInt + ";" + (if( (i+1) % 10 == 0 ) "\n" else "")
println( "ctrl filtered out: <br/><br/>\n\n" + htmlNoCtrlCode.mkString  + "<br/><br/>\n" )


// Keep 0x00-0x7f and remove control codes
val sNoExtCode = ustring.replaceAll("[^\\p{InBasicLatin}]","").replaceAll("[\\p{C}]","") 

val htmlNoExtCode = for( i <- sNoExtCode.indices ) yield 
  "&#" + sNoExtCode(i).toInt + ";" + (if( (i+1) % 10 == 0 ) "\n" else "")
println( "ctrl and extended filtered out: <br/><br/>\n\n" + htmlNoExtCode.mkString  + "<br/><br/>\n" )</syntaxhighlight>
{{out}}
<pre>ctrl filtered out:

&#1178;&#1779;&#1209;&#1597;&#1888;&#268;&#471;&#32;&#580;&#1582;&#575;&#1147;&#570;&#183;&#726;&#1166;&#68;&#1520;&#1129;&#1336;&#1509;&#758;&#1636;&#478;&#317;&#1773;&#1297;&#995;&#689;&#385;&#939;&#1740;&#1400;&#976;&#1755;&#1557;&#415;&#881;&#1220;&#1510;
&#1886;&#196;&#1210;&#996;&#938;&#113;&#838;&#1910;&#562;&#1414;&#1451;&#1374;&#1121;&#1624;&#1658;&#1861;&#1894;&#992;&#1784;&#1822;&#1045;&#178;&#587;&#1673;&#1170;&#1218;&#527;&#984;&#666;&#935;&#766;&#1825;&#563;&#1415;&#1355;&#406;&#1491;&#519;&#1920;&#1719;
&#1251;&#1546;&#1369;&#808;&#1759;&#1728;&#294;&#172;&#962;&#1863;&#1563;&#319;&#927;&#1365;&#412;&#49;&#1333;&#1763;&#1900;&#878;&#452;&#810;&#1593;&#1684;&#1034;&#1715;&#339;&#1247;&#1146;&#1372;&#684;&#922;&#1856;&#855;&#1525;&#830;&#650;&#225;&#455;&#1130;
&#1657;&#557;&#1501;&#1966;&#581;&#1436;&#700;&#1893;&#1956;&#1678;&#1738;&#898;&#365;&#1025;&#761;&#299;&#694;&#241;&#1788;&#91;&#1480;&#1277;&#1607;&#58;&#51;&#348;&#83;&#1307;&#291;&#243;&#849;&#1565;&#1032;&#1497;&#773;&#1871;&#748;&#750;&#1110;&#1741;
&#80;&#1285;&#77;&#1527;&#1135;&#1334;&#596;&#1850;&#1432;&#1911;&#1342;&#1725;&#718;&#926;&#110;&#783;&#343;&#1767;&#722;&#1957;&#1015;&#453;&#320;&#755;&#1120;&#814;&#1877;&#361;&#1731;&#633;&#446;&#1930;&#1148;&#1818;&#1613;&#1698;&#381;&#1819;&#324;&#1387;
&#1984;&#67;&#382;&#702;&#884;&#1412;&#1261;&#958;&#1174;&#1186;&#472;&#90;&#60;&#636;&#208;&#1349;&#788;&#1895;&#1574;&#1643;&#662;&#1132;&#809;&#1996;&#511;&#583;&#1915;&#247;&#1106;&#932;&#448;&#1105;&#1363;&#74;&#1126;&#1019;&#933;&#168;&#806;&#1701;
&#717;&#854;&#1645;&#1079;&#1889;&#1127;&#1505;&#822;&#821;&#175;&#528;&#396;&#1965;&#1326;&#985;&#1190;&#43;&#1702;&#199;&#1421;&#637;&#421;&#1062;&#1769;&#486;&#1184;&#234;&#679;&#622;&#240;&#803;&#815;&#1944;&#429;&#416;&#890;&#1952;&#1530;&#1897;&#947;
&#1139;&#1418;&#1053;&#1756;&#218;&#1274;&#1005;&#771;&#1909;&#428;&#327;&#1038;&#1627;&#1322;&#1395;&#607;&#1065;&#1035;&#1457;&#988;&#1938;&#102;&#1939;&#680;&#1540;&#1838;&#625;&#1394;&#364;&#941;&#463;&#117;&#1417;&#1208;&#709;&#1585;&#638;&#664;&#1526;&#837;
&#1987;&#190;&#170;&#34;&#598;&#574;&#973;&#404;&#253;&#1352;&#1289;&#1379;&#552;&#1724;&#1774;&#845;&#245;&#344;&#93;&#224;&#1994;&#1841;&#1067;&#1204;&#1623;&#1310;&#1762;&#160;&#706;&#1729;&#414;&#1531;&#634;&#410;&#1758;&#1188;&#1723;&#440;&#501;&#495;
&#1796;&#672;&#434;&#357;&#239;&#1824;&#109;&#1058;&#971;&#613;&#904;&#974;&#886;&#1634;&#1558;&#1660;&#92;&#372;&#739;&#233;&#1428;&#1700;&#255;&#987;&#963;&#1986;&#923;&#248;&#670;&#1279;&#259;&#1396;&#1545;&#1002;&#1047;&#1402;&#403;&#1158;&#1792;&#1904;
&#1145;&#911;&#616;&#1171;&#1714;&#384;&#606;&#1303;&#50;&#54;&#276;&#373;&#179;&#1125;&#859;&#488;&#1348;&#467;&#315;&#1420;&#1674;&#669;&#1273;&#653;&#800;&#1008;&#888;&#644;&#1357;&#601;&#1797;&#1083;&#289;&#1935;&#460;&#756;&#643;&#1781;&#1018;&#454;
&#1375;&#1212;&#776;&#1785;&#1338;&#1998;&#1052;&#1923;&#1141;&#843;&#1598;&#1031;&#1104;&#124;&#1320;&#1577;&#1885;&#597;&#469;&#1716;&#457;&#553;&#254;&#1552;&#1542;&#1481;&#106;&#767;&#1602;&#1789;&#627;&#1054;&#1143;&#281;&#307;&#1647;&#194;&#283;&#1971;&#564;
&#723;&#1495;&#1707;&#1632;&#1925;&#1498;&#263;&#1569;&#585;&#1250;&#599;&#1095;&#1033;&#337;&#860;&#1024;&#1448;&#1746;&#1016;&#1853;&#1280;&#187;&#1101;&#1112;&#1735;&#1955;&#1444;&#1168;&#842;&#555;&#1927;&#594;&#1747;&#1783;&#833;&#1590;&#1238;&#921;&#1614;&#1041;
&#215;&#691;&#1191;&#1029;&#535;&#85;&#389;&#375;&#200;&#632;&#533;&#1798;&#309;&#1942;&#513;&#610;&#1276;&#1298;&#1122;&#1389;&#470;&#64;&#481;&#560;&#1368;&#1973;&#1118;&#1165;&#1043;&#1243;&#186;&#1790;&#1507;&#724;&#1098;&#867;&#655;&#171;&#1115;&#1679;
&#1581;&#479;&#918;&#1301;&#401;&#508;&#1385;&#1656;&#101;&#1446;&#663;&#1936;&#1677;&#409;&#1050;&#1339;&#831;&#953;&#252;&#807;&#180;&#1411;&#1009;&#676;&#1837;&#951;&#439;&#1128;&#1070;&#1325;&#1151;&#162;&#223;&#1882;&#1554;&#1642;&#1193;&#674;&#1722;&#96;
&#1760;&#956;&#432;&#589;&#1225;&#216;&#78;&#812;&#1928;&#408;&#520;&#1422;&#477;&#1625;&#1271;&#936;&#1080;&#165;&#1367;&#1077;&#959;&#1899;&#823;&#407;&#63;&#880;&#313;&#1437;&#1912;&#95;&#1543;&#192;&#780;&#1473;&#251;&#677;&#301;&#566;&#461;&#1300;
&#1199;&#417;&#789;&#1490;&#1528;&#727;&#977;&#1252;&#1532;&#1264;&#39;&#940;&#1846;&#1134;&#256;&#1588;&#1713;&#1275;&#507;&#1852;&#447;&#1801;&#874;&#1981;&#1136;&#787;&#1809;&#75;&#126;&#1200;&#1454;&#960;&#1196;&#695;&#747;&#1775;&#1663;&#112;&#1042;&#805;
&#1407;&#1555;&#1037;&#1810;&#754;&#1253;&#624;&#1959;&#1692;&#1323;&#846;&#1023;&#369;&#1224;&#998;&#420;&#1699;&#659;&#398;&#1137;&#1947;&#1103;&#226;&#1969;&#443;&#1028;&#195;&#824;&#1600;&#770;&#1429;&#1242;&#876;&#791;&#1443;&#1254;&#1860;&#1745;&#422;&#1814;
&#1988;&#631;&#1737;&#1704;&#529;&#1393;&#1030;&#534;&#431;&#366;&#181;&#1761;&#1091;&#295;&#1766;&#1616;&#817;&#1314;&#593;&#1060;&#1534;&#1633;&#826;&#1583;&#642;&#115;&#1401;&#46;&#1739;&#1214;&#279;&#232;&#749;&#1655;&#98;&#1006;&#1905;&#1876;&#489;&#648;
&#571;&#105;&#875;&#1007;&#1318;&#282;&#1595;&#355;&#1805;&#1517;&#1381;&#1471;&#967;&#1978;&#1858;&#1578;&#1793;&#1388;&#576;&#1075;&#1945;&#549;&#329;&#712;&#1351;&#1891;&#816;&#1226;&#617;&#626;&#546;&#1241;&#458;&#556;&#1433;&#1472;&#1916;&#335;&#1603;&#1069;
&#658;&#1521;&#828;&#1113;&#1092;&#515;&#72;&#1366;&#1567;&#1154;&#802;&#661;&#690;&#444;&#1968;&#1216;&#321;&#1668;&#1976;&#764;&#517;&#1305;&#217;&#55;&#1617;&#383;&#1752;&#1641;&#561;&#1439;&#405;&#853;&#646;&#346;&#892;&#1413;&#176;&#1544;&#62;&#1914;
...


ctrl and extended filtered out:

&#32;&#68;&#113;&#49;&#91;&#58;&#51;&#83;&#80;&#77;&#110;&#67;&#90;&#60;&#74;&#43;&#102;&#117;&#34;&#93;&#109;&#92;&#50;&#54;&#124;&#106;&#85;&#64;&#101;&#96;&#78;&#63;&#95;&#39;&#75;&#126;&#112;&#115;&#46;&#98;&#105;&#72;&#55;&#62;&#122;&#65;&#88;&#86;&#70;&#53;
&#61;&#79;&#103;&#66;&#104;&#89;&#71;&#99;&#45;&#52;&#41;&#69;&#47;&#42;&#97;&#44;&#37;&#119;&#84;&#76;&#111;&#82;&#38;&#87;&#123;&#107;&#100;&#125;&#56;&#108;&#94;&#59;&#48;&#35;&#40;&#33;&#116;&#114;&#118;&#73;&#120;&#36;&#81;&#121;&#57;</pre>

=={{header|sed}}==
To strip control codes only:
<syntaxhighlight lang="sed">s/[[:cntrl:]]//g</syntaxhighlight>
To strip control codes and extended characters:
<syntaxhighlight lang="sed">s/[^[:print:]]//g</syntaxhighlight>
For this to work properly with sed implementations supporting multibyte character encodings (like UTF-8), the environment variable LC_ALL=C might need to be set.
{{out}}
<pre>
$ printf 'Just\tä\tString\n' | LC_ALL=C sed 's/[[:cntrl:]]//g'
JustäString
$ printf 'Just\tä\tString\n' | LC_ALL=C sed 's/[^[:print:]]//g'
JustString
</pre>

=={{header|Seed7}}==
Seed7 [http://seed7.sourceforge.net/manual/types.htm#string strings] are UTF-32 encoded,
therefore no destinction between BYTE and Unicode strings is necessary.
The example below uses [http://seed7.sourceforge.net/libraries/utf8.htm#STD_UTF8_OUT STD_UTF8_OUT]
from the library [http://seed7.sourceforge.net/libraries/utf8.htm utf8.s7i], to write
Unicode characters with UTF-8 encoding to the console.

<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";
  include "utf8.s7i";

const func string: stripControl (in string: stri) is func
  result
    var string: stripped is "";
  local
    var integer: old_pos is 1;
    var integer: index is 0;
    var char: ch is ' ';
  begin
    for ch key index range stri do
      if ch < ' ' or ch = '\127;' then
        stripped &:= stri[old_pos .. pred(index)];
        old_pos := succ(index);
      end if;
    end for;
    stripped &:= stri[old_pos ..];
  end func;

const func string: stripControlAndExtended (in string: stri) is func
  result
    var string: stripped is "";
  local
    var integer: old_pos is 1;
    var integer: index is 0;
    var char: ch is ' ';
  begin
    for ch key index range stri do
      if ch < ' ' or ch >= '\127;' then
        stripped &:= stri[old_pos .. pred(index)];
        old_pos := succ(index);
      end if;
    end for;
    stripped &:= stri[old_pos ..];
  end func;

const string: src is "déjà vu\              # Unicode
    \\n\0;\31; \33;\126;\127;\128;\255;\n\  # Various boundary cases
    \as⃝df̅";                                 # Unicode combining characters

const proc: main is func
  begin
    OUT := STD_UTF8_OUT;
    writeln("source text:");
    writeln(src);
    writeln("Stripped of control codes:");
    writeln(stripControl(src));
    writeln("Stripped of control codes and extended characters:");
    writeln(stripControlAndExtended(src));
  end func;</syntaxhighlight>

Output:
<pre>
source text:
déjà vu
� !~��ÿ
as⃝df̅
Stripped of control codes:
déjà vu !~�ÿas⃝df̅
Stripped of control codes and extended characters:
dj vu !~asdf
</pre>

=={{header|Sidef}}==
<syntaxhighlight lang="ruby">var str = "\ba\x00b\n\rc\fd\xc3\x7ffoo"

var letters = str.chars.map{.ord}
say letters.map{.chr}.join.dump

var nocontrols = letters.grep{ (_ > 32) && (_ != 127) }
say nocontrols.map{.chr}.join.dump

var noextended = nocontrols.grep{ _ < 127 }
say noextended.map{.chr}.join.dump</syntaxhighlight>
{{out}}
<pre>
"\ba\0b\n\rc\fd\xC3\x7Ffoo"
"abcd\xC3foo"
"abcdfoo"
</pre>

=={{header|Standard ML}}==
<syntaxhighlight lang="sml">(* string -> string *)
val stripCntrl = concat o String.tokens Char.isCntrl

(* string -> string *)
val stripCntrlAndExt = concat o String.tokens (not o Char.isPrint)</syntaxhighlight>

=={{header|Tcl}}==
<syntaxhighlight lang="tcl">proc stripAsciiCC str {
    regsub -all {[\u0000-\u001f\u007f]+} $str ""
}
proc stripCC str {
    regsub -all {[^\u0020-\u007e]+} $str ""
}</syntaxhighlight>

=={{header|TI-83 BASIC}}==
TI-83 BASIC doesn't support ASCII or Unicode, so the following program just strips every character that doesn't have a corresponding glyph from 32 to 126 decimal in a real ASCII table. 

The following "normal characters" do exist, but can't be typed on the calculator and a hex editor must be used to enter them:

<syntaxhighlight lang="ti83b">#$&@;_`abcdefghijklmnopqrstuvwxyz|~</syntaxhighlight>

The double quote character (ASCII decimal 34) can be entered, but cannot be escaped and thus cannot be stored to strings without the use of hex editors. The following program will remove double quotes from the input string if they were hacked in simply because having one stored to the "check" string is syntactically invalid.

So, in sum, you have to hack the calculator to enter in this program, but once it's entered you can transfer it to unhacked calculators and it will work.

<syntaxhighlight lang="ti83b">:" !#$%&'()*+,-./0123456789:;<=>?ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"→Str0
:Input ">",Str1
:":"+Str1+":"→Str1
:For(I,2,length(Str1)-2)
:If not(inString(Str0,sub(Str1,I,1)))
:sub(Str1,1,I-1)+sub(Str1,I+1,length(Str1)-(I+1))→Str1
:End
:sub(Str1,2,length(Str1)-1)→Str1
:Pause Str1</syntaxhighlight>

=={{header|TXR}}==

{{trans|Racket}}

<syntaxhighlight lang="txrlisp">(defun strip-controls (str)
 (regsub #/[\x0-\x1F\x7F]+/ "" str))

(defun strip-controls-and-extended (str)
  (regsub #/[^\x20-\x7F]+/ "" str))</syntaxhighlight>

=={{header|VBScript}}==
Derived from the BASIC version.
<syntaxhighlight lang="vb">
Function StripCtrlCodes(s)
	tmp = ""
	For i = 1 To Len(s)
		n = Asc(Mid(s,i,1))
		If (n >= 32 And n <= 126) Or n >=128 Then
			tmp = tmp & Mid(s,i,1)
		End If
	Next
	StripCtrlCodes = tmp	
End Function

Function StripCtrlCodesExtChrs(s)
	tmp = ""
	For i = 1 To Len(s)
		n = Asc(Mid(s,i,1))
		If n >= 32 And n <= 126 Then
			tmp = tmp & Mid(s,i,1)
		End If
	Next
	StripCtrlCodesExtChrs = tmp	
End Function

WScript.StdOut.Write "ab�cd�ef�gh�€" & " = " & StripCtrlCodes("ab�cd�ef�gh�€")
WScript.StdOut.WriteLine
WScript.StdOut.Write "ab�cd�ef�gh�ij†klð€" & " = " & StripCtrlCodesExtChrs("ab�cd�ef�gh�ij†klð€")
WScript.StdOut.WriteLine
</syntaxhighlight>

{{Out}}
<pre>
ab�cd�ef�gh�€ = abcdefgh€
ab�cd�ef�gh�ij†klð€ = abcdefghijkl
</pre>

=={{header|V (Vlang)}}==
{{trans|AutoHotkey}}
<syntaxhighlight lang="v (vlang)">fn main() {
    println(stripped("\ba\x00b\n\rc\fd\xc3"))
}

fn stripped(source string) string {
    mut result := ''
    for value in source	{if value > 31 && value < 128 {result += value.ascii_str()}}
    return result
}</syntaxhighlight>

{{Out}}
<pre>
abcd
</pre>

=={{header|Wren}}==
{{libheader|Wren-pattern}}
<syntaxhighlight lang="ecmascript">import "/pattern" for Pattern

var s = "\t\n\r\x01\0\fabc\v\v\b\a\x1f\x7f🌇Páez😃É"

// strip control codes only
var p = Pattern.new("+1/c")
var r = p.replaceAll(s, "")
System.print("%(r) -> length %(r.count)")

// strip extended characters as well
p = Pattern.new("[+1/c|+1/R]")
r = p.replaceAll(s, "")
System.print("%(r) -> length %(r.count)")
</syntaxhighlight>

{{out}}
<pre>
abc🌇Páez😃É -> length 10
abcPez -> length 6
</pre>

=={{header|XPL0}}==
<syntaxhighlight lang="xpl0">include c:\cxpl\codes;          \intrinsic 'code' declarations
string 0;                       \use zero-terminated string convention

proc Strip(Str, Both);          \Strip out control and optionally extended chars
char Str; int Both;
int  I, J, C;
[I:= 0;
while Str(I) do
    [C:= Str(I);
    if Both then C:= extend(C); \if stripping extended chars too, extend sign
    if C<$20 or C=$7F then
        [J:= I;                 \eliminate char by shifting string down over it
        repeat  C:= Str(J+1);
                Str(J):= C;
                J:= J+1;
        until   C=0;
        ]
    else I:= I+1;
    ];
];

char String;
[String:= "Hello^M^J World àáâã";
Text(0, String);  CrLf(0);
Strip(String, false);
Text(0, String);  CrLf(0);
Strip(String, true);
Text(0, String);  CrLf(0);
]</syntaxhighlight>

Output:
<pre>
Hello
 World àáâã
Hello World àáâã
Hello World 
</pre>

=={{header|zkl}}==
ASCII
<syntaxhighlight lang="zkl">var ctlCodes=([1..31].pump(String,"toChar") +(127).toChar());
var extdChars=[127..255].pump(String,"toChar");

var test = "string of ☺☻♥♦⌂, control characters(\t\b\e) and other ilk.♫☼§►↔◄";
test.println("<< test string");
(test-ctlCodes).println("<< no control chars");
(test-extdChars).println("<< no extended chars");
(test-extdChars-ctlCodes).println("<< text");
</syntaxhighlight>
{{out}}
<pre>
string of ☺☻♥♦⌂, control characters(   and other ilk.♫☼§►↔◄<< test string
string of ☺☻♥♦⌂, control characters() and other ilk.♫☼§►↔◄<< no control chars
string of , control characters(and other ilk.<< no extended chars
string of , control characters() and other ilk.<< text
</pre>


{{omit from|GUISS}}
{{omit from|Openscad}}