Substring/Top and tail: Difference between revisions
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{{draft task}} |
{{draft task}}[[Category:String manipulation]] |
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The task is to demonstrate how to remove the first and last characters from a string. The solution should demonstrate how to obtain the following results: |
The task is to demonstrate how to remove the first and last characters from a string. The solution should demonstrate how to obtain the following results: |
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* String with last character removed |
* String with last character removed |
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* String with both the first and last characters removed |
* String with both the first and last characters removed |
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=={{header|Perl}}== |
=={{header|Perl}}== |
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room</pre> |
room</pre> |
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[[Category:String manipulation]] |
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Revision as of 08:46, 6 June 2011
The task is to demonstrate how to remove the first and last characters from a string. The solution should demonstrate how to obtain the following results:
- String with first character removed
- String with last character removed
- String with both the first and last characters removed
Perl
<lang perl>print substr("knight",1), "\n"; # strip first character print substr("socks", 0, -1), "\n"; # strip last character print substr("brooms", 1, -1), "\n"; # strip both first and last characters</lang>
In perl, we can also remove the last character from a string variable with the chop function:
<lang perl>$string = 'ouch'; $bits = chop($string); # The last letter is returned by the chop function print $bits; # h print $string; # ouc # See we really did chop the last letter off</lang>
PureBasic
<lang PureBasic>If OpenConsole()
PrintN(Right("knight", Len("knight") - 1)) ;strip the first letter PrintN(Left("socks", Len("socks")- 1)) ;strip the last letter PrintN(Mid("brooms", 2, Len("brooms") - 2)) ;strip both the first and last letter Print(#CRLF$ + #CRLF$ + "Press ENTER to exit"): Input() CloseConsole()
EndIf</lang> Sample output:
night sock room
ZX Spectrum Basic
<lang zxbasic>10 PRINT FN f$("knight"): REM strip the first letter 20 PRINT FN l$("socks"): REM strip the last letter 30 PRINT FN b$("brooms"): REM strip both the first and last letter 100 STOP
9000 DEF FN f$(a$)=a$(2 TO LEN(a$)) 9010 DEF FN l$(a$)=a$(1 TO LEN(a$)-(1 AND (LEN(a$)>=1))) 9020 DEF FN b$(a$)=FN l$(FN f$(a$)) </lang>