Empty directory
You are encouraged to solve this task according to the task description, using any language you may know.
Starting with a path to some directory, determine whether the directory is empty.
An empty directory contains no files nor subdirectories.
With Unix or Windows systems, every directory contains an entry for “.” and almost every directory contains “..” (except for a root directory); an empty directory contains no other entries.
11l
<lang 11l>I fs:list_dir(input()).empty
print(‘empty’)
E
print(‘not empty’)</lang>
Ada
<lang Ada>with Ada.Text_IO; use Ada.Text_IO; with Ada.Directories; procedure EmptyDir is
function Empty (path : String) return String is
use Ada.Directories;
result : String := "Is empty.";
procedure check (ent : Directory_Entry_Type) is begin
if Simple_Name (ent) /= "." and Simple_Name (ent) /= ".." then
Empty.result := "Not empty";
end if;
end check;
begin
if not Exists (path) then return "Does not exist.";
elsif Kind (path) /= Directory then return "Not a Directory.";
end if;
Search (path, "", Process => check'Access);
return result;
end Empty;
begin
Put_Line (Empty ("."));
Put_Line (Empty ("./empty"));
Put_Line (Empty ("./emptydir.adb"));
Put_Line (Empty ("./foobar"));
end EmptyDir;</lang>
- Output:
Not empty Is empty. Not a Directory. Does not exist.
ALGOL 68
This uses the "argc", "argv", "file is directory" and "get directory" procedures specific to Algol 68 G.
Note the Algol 68 G interpreter processes the command line parameters before "-" so this example expects the directory names to follow "-".
<lang algol68># returns TRUE if the specified directory is empty, FALSE if it doesn't exist or is non-empty #
PROC is empty directory = ( STRING directory )BOOL:
IF NOT file is directory( directory )
THEN
# directory doesn't exist #
FALSE
ELSE
# directory is empty if it contains no files or just "." and possibly ".." #
[]STRING files = get directory( directory );
BOOL result := FALSE;
FOR f FROM LWB files TO UPB files
WHILE result := files[ f ] = "." OR files[ f ] = ".."
DO
SKIP
OD;
result
FI # is empty directory # ;
- test the is empty directory procedure #
- show whether the directories specified on the command line ( following "-" ) are empty or not #
BOOL directory name parameter := FALSE; FOR i TO argc DO
IF argv( i ) = "-"
THEN
# marker to indicate directory names follow #
directory name parameter := TRUE
ELIF directory name parameter
THEN
# have a directory name - report whether it is emty or not #
print( ( argv( i ), " is ", IF is empty directory( argv( i ) ) THEN "empty" ELSE "not empty" FI, newline ) )
FI
OD</lang>
- Output:
H:\algol\rosetta>a68g emptyDirectory.a68 - . /temp \zz . is not empty /temp is not empty \zz is empty
Arturo
<lang rebol>emptyDir?: function [folder]-> empty? list folder
print emptyDir? "."</lang>
- Output:
false
AutoHotkey
<lang autohotkey>MsgBox % isDir_empty(A_ScriptDir)?"true":"false"
isDir_empty(p) { Loop, %p%\* , 1 return 0 return 1 }</lang>
- Output:
false
AWK
<lang AWK>
- syntax: GAWK -f EMPTY_DIRECTORY.AWK
BEGIN {
n = split("C:\\TEMP3,C:\\NOTHERE,C:\\AWK\\FILENAME,C:\\WINDOWS",arr,",")
for (i=1; i<=n; i++) {
printf("'%s' %s\n",arr[i],is_dir(arr[i]))
}
exit(0)
} function is_dir(path, cmd,dots,entries,msg,rec,valid_dir) {
cmd = sprintf("DIR %s 2>NUL",path) # MS-Windows
while ((cmd | getline rec) > 0) {
if (rec ~ /[0-9]:[0-5][0-9]/) {
if (rec ~ / (\.|\.\.)$/) { # . or ..
dots++
continue
}
entries++
}
if (rec ~ / Dir\(s\) .* bytes free$/) {
valid_dir = 1
}
}
close(cmd)
if (valid_dir == 0) {
msg = "does not exist"
}
else if (valid_dir == 1 && entries == 0) {
msg = "is an empty directory"
}
else if (dots == 0 && entries == 1) {
msg = "is a file"
}
else {
msg = sprintf("is a directory with %d entries",entries)
}
return(msg)
} </lang>
- Output:
'C:\TEMP3' is an empty directory 'C:\NOTHERE' does not exist 'C:\AWK\FILENAME' is a file 'C:\WINDOWS' is a directory with 98 entries
BaCon
<lang bacon>FUNCTION check$(dir$)
IF FILEEXISTS(dir$) THEN
RETURN IIF$(LEN(WALK$(dir$, 127, ".+", FALSE)), " is NOT empty.", " is empty." )
ELSE
RETURN " doesn't exist."
ENDIF
ENDFUNCTION
dir$ = "bla" PRINT "Directory '", dir$, "'", check$(dir$)
dir$ = "/mnt" PRINT "Directory '", dir$, "'", check$(dir$)
dir$ = "." PRINT "Directory '", dir$, "'", check$(dir$)</lang>
- Output:
Directory 'bla' doesn't exist. Directory '/mnt' is empty. Directory '.' is NOT empty.
Batch File
This demo verifies first if the directory exists. This script returns errorlevel code:
- 0 - input directory is empty.
- 1 - input directory is NOT empty.
- 2 - input directory does not exist.
- 3 - input not found.
<lang dos>@echo off if "%~1"=="" exit /b 3 set "samp_path=%~1" set "tst_var="
%== Store the current directory of the CMD ==% for /f %%T in ('cd') do set curr_dir=%%T
%== Go to the samp_path ==% cd %samp_path% 2>nul ||goto :folder_not_found
%== The current directory is now samp_path ==% %== Scan what is inside samp_path ==% for /f "usebackq delims=" %%D in ( `dir /b 2^>nul ^& dir /b /ah 2^>nul` ) do set "tst_var=1"
if "%tst_var%"=="1" ( echo "%samp_path%" is NOT empty. cd %curr_dir% exit /b 1 ) else ( echo "%samp_path%" is empty. cd %curr_dir% exit /b 0 )
- folder_not_found
echo Folder not found. exit /b 2</lang>
- Sample Session:
(Saved the Batch File as IsEmpty.Bat in C:\)
C:\>IsEmpty C:\>echo %errorlevel% 3 C:\>IsEmpty "C:\Sample" Folder not found. C:\>md Sample C:\>IsEmpty "C:\Sample" "C:\Sample" is empty. C:\>cd Sample C:\Sample>echo 0123456789 >>digits.txt C:\Sample>dir /b digits.txt C:\Sample>cd.. C:\>IsEmpty "C:\Sample" "C:\Sample" is NOT empty. C:\>
BBC BASIC
<lang bbcbasic> IF FNisdirectoryempty("C:\") PRINT "C:\ is empty" ELSE PRINT "C:\ is not empty"
IF FNisdirectoryempty("C:\temp") PRINT "C:\temp is empty" ELSE PRINT "C:\temp is not empty"
END
DEF FNisdirectoryempty(dir$)
LOCAL dir%, sh%, res%
DIM dir% LOCAL 317
IF RIGHT$(dir$)<>"\" dir$ += "\"
SYS "FindFirstFile", dir$+"*", dir% TO sh%
IF sh% = -1 ERROR 100, "Directory doesn't exist"
res% = 1
REPEAT
IF $$(dir%+44)<>"." IF $$(dir%+44)<>".." EXIT REPEAT
SYS "FindNextFile", sh%, dir% TO res%
UNTIL res% == 0
SYS "FindClose", sh%
= (res% == 0)</lang>
C
<lang c>#include <stdio.h>
- include <dirent.h>
- include <string.h>
int dir_empty(const char *path) { struct dirent *ent; int ret = 1;
DIR *d = opendir(path); if (!d) { fprintf(stderr, "%s: ", path); perror(""); return -1; }
while ((ent = readdir(d))) { if (!strcmp(ent->d_name, ".") || !(strcmp(ent->d_name, ".."))) continue; ret = 0; break; }
closedir(d); return ret; }
int main(int c, char **v) { int ret = 0, i; if (c < 2) return -1;
for (i = 1; i < c; i++) { ret = dir_empty(v[i]); if (ret >= 0) printf("%s: %sempty\n", v[i], ret ? "" : "not "); }
return 0;
}</lang>Running it:
% mkdir stuff; ./a.out /usr/ ./stuff /etc/passwd /usr/: not empty ./stuff: empty /etc/passwd: Not a directory
C#
<lang csharp>using System; using System.IO;
class Program {
static void Main( string[] args )
{
foreach ( string dir in args )
{
Console.WriteLine( "'{0}' {1} empty", dir, IsDirectoryEmpty( dir ) ? "is" : "is not" );
}
}
private static bool IsDirectoryEmpty( string dir )
{
return ( Directory.GetFiles( dir ).Length == 0 &&
Directory.GetDirectories( dir ).Length == 0 );
}
} </lang>
Running it:
Assume c:\temp exists and is not empty, c:\temp\empty exists and is empty c:\>IsEmptyDir c:\temp c:\temp\empty 'c:\temp' is not empty 'c:\temp\empty' is empty
C++
<lang cpp>
- include <iostream>
- include <boost/filesystem.hpp>
using namespace boost::filesystem;
int main(int argc, char *argv[]) {
for (int i = 1; i < argc; ++i) {
path p(argv[i]);
if (exists(p) && is_directory(p))
std::cout << "'" << argv[i] << "' is" << (!is_empty(p) ? " not" : "") << " empty\n";
else
std::cout << "dir '" << argv[i] << "' could not be found\n";
}
} </lang>
Clojure
<lang clojure>(require '[clojure.java.io :as io]) (defn empty-dir? [path]
(let [file (io/file path)] (assert (.exists file)) (assert (.isDirectory file)) (-> file .list empty?))) ; .list ignores "." and ".."</lang>
CoffeeScript
<lang coffeescript> fs = require 'fs'
is_empty_dir = (dir) ->
throw Error "#{dir} is not a dir" unless fs.statSync(dir).isDirectory()
# readdirSync does not return . or ..
fns = fs.readdirSync dir
fns.length == 0
</lang>
Common Lisp
Will also return T if path doesn't exist.
<lang lisp>
(defun empty-directory-p (path)
(and (null (directory (concatenate 'string path "/*")))
(null (directory (concatenate 'string path "/*/")))))
</lang>
D
<lang d>import std.stdio, std.file;
void main() {
auto dir = "somedir"; writeln(dir ~ " is empty: ", dirEmpty(dir));
}
bool dirEmpty(string dirname) {
if (!exists(dirname) || !isDir(dirname))
throw new Exception("dir not found: " ~ dirname);
return dirEntries(dirname, SpanMode.shallow).empty;
}</lang>
somedir is empty: false
Delphi
<lang Delphi> program Empty_directory;
{$APPTYPE CONSOLE}
uses
System.SysUtils, System.IOUtils;
function IsDirectoryEmpty(dir: string): Boolean; var
count: Integer;
begin
count := Length(TDirectory.GetFiles(dir)) + Length(TDirectory.GetDirectories(dir)); Result := count = 0;
end;
var
i: Integer;
const
CHECK: array[Boolean] of string = (' is not', ' is');
begin
if ParamCount > 0 then
for i := 1 to ParamCount do
Writeln(ParamStr(i), CHECK[IsDirectoryEmpty(ParamStr(i))], ' empty');
Readln;
end.</lang>
- Output:
The same of c#.
Elixir
<lang elixir>path = hd(System.argv) IO.puts File.dir?(path) and Enum.empty?( File.ls!(path) )</lang>
Erlang
From the Erlang shell, or in a program, match {ok, []}. It this works the directory is empty.
- Output:
3> {ok, []} = file:list_dir_all("/usr").
** exception error: no match of right hand side value
{ok,["X11R6","X11","standalone","share","sbin","local",
"libexec","lib","bin"]}
4> {ok, []} = file:list_dir_all("/asd").
** exception error: no match of right hand side value {error,enoent}
5> {ok, []} = file:list_dir_all("./empty").
{ok,[]}
F#
<lang fsharp>open System.IO let isEmptyDirectory x = (Directory.GetFiles x).Length = 0 && (Directory.GetDirectories x).Length = 0</lang>
Factor
<lang factor>USE: io.directories
- empty-directory? ( path -- ? ) directory-entries empty? ;</lang>
FreeBASIC
<lang freebasic>' FB 1.05.0 Win64
- Include "dir.bi"
Function IsDirEmpty(dirPath As String) As Boolean
Err = 0
' check dirPath is a valid directory
Dim As String fileName = Dir(dirPath, fbDirectory)
If Len(fileName) = 0 Then
Err = 1000 ' dirPath is not a valid path
Return False
End If
' now check if there are any files/subdirectories in it other than . and ..
Dim fileSpec As String = dirPath + "\*.*"
Const attribMask = fbNormal Or fbHidden Or fbSystem Or fbDirectory
Dim outAttrib As UInteger
fileName = Dir(fileSpec, attribMask, outAttrib) ' get first file
Do
If fileName <> ".." AndAlso fileName <> "." Then
If Len(fileName) = 0 Then Return True
Exit Do
End If
fileName = Dir ' get next file
Loop
Return False
End Function
Dim outAttrib As UInteger Dim dirPath As String = "c:\freebasic\docs" ' known to be empty Dim empty As Boolean = IsDirEmpty(dirPath) Dim e As Long = Err If e = 1000 Then
Print "'"; dirPath; "' is not a valid directory" End
End If If empty Then
Print "'"; dirPath; "' is empty"
Else
Print "'"; dirPath; "' is not empty"
End If Print Print "Press any key to quit" Sleep</lang>
- Output:
'c:\freebasic\docs' is empty
Gambas
<lang gambas>Public Sub Main() Dim sFolder As String = User.home &/ "Rosetta" Dim sDir As String[] = Dir(sFolder) Dim sTemp As String Dim sOutput As String = sfolder & " is NOT empty"
Try sTemp = sDir[0] If Error Then sOutput = sfolder & " is empty"
Print sOutput
End</lang> Output:
/home/charlie/Rosetta is empty
Go
<lang go>package main
import ( "fmt" "io/ioutil" "log" )
func main() { empty, err := IsEmptyDir("/tmp") if err != nil { log.Fatalln(err) } if empty { fmt.Printf("/tmp is empty\n") } else { fmt.Printf("/tmp is not empty\n") } }
func IsEmptyDir(name string) (bool, error) { entries, err := ioutil.ReadDir(name) if err != nil { return false, err } return len(entries) == 0, nil } </lang>
Groovy
Solution: <lang groovy>def isDirEmpty = { dirName ->
def dir = new File(dirName) dir.exists() && dir.directory && (dir.list() as List).empty
}</lang>
Test: <lang groovy>def currentDir = new File('.') def random = new Random() def subDirName = "dir${random.nextInt(100000)}" def subDir = new File(subDirName) subDir.mkdir() subDir.deleteOnExit()
assert ! isDirEmpty('.') assert isDirEmpty(subDirName)</lang>
Haskell
<lang haskell>import System.Directory (getDirectoryContents) import System.Environment (getArgs)
isEmpty x = getDirectoryContents x >>= return . f . (== [".", ".."])
where f True = "Directory is empty"
f False = "Directory is not empty"
main = getArgs >>= isEmpty . (!! 0) >>= putStrLn</lang> Test: <lang>$ mkdir 1 $ ./isempty 1 Directory is empty $ ./isempty /usr/ Directory is not empty</lang>
Icon and Unicon
This example uses Unicon extensions. The 'empty' sub-directory was manually setup for this test. <lang Icon>procedure main()
every dir := "." | "./empty" do
write(dir, if isdirempty(dir) then " is empty" else " is not empty")
end
procedure isdirempty(s) #: succeeds if directory s is empty (and a directory) local d,f
if ( stat(s).mode ? ="d" ) & ( d := open(s) ) then {
while f := read(d) do
if f == ("."|"..") then next else fail
close(d)
return s
}
else stop(s," is not a directory or will not open")
end</lang>
- Output:
. is not empty ./empty is empty
J
<lang j>require 'dir' empty_dir=: 0 = '/*' #@dir@,~ ]</lang>
In other words, list the contents of the directory, count how many items are in it, and test if that count was zero.
Note that 1!:0 could have been used here, instead of the dir cover.
Example, under windows, create some directories using cygwin:
<lang bash>$ mkdir /tmp/a $ touch /tmp/a/... $ mkdir /tmp/b $ mkdir /tmp/c $ mkdir /tmp/c/d</lang>
Then, testing these directories, in J:
<lang j> empty_dir 'c:/cygwin/tmp/a' 0
empty_dir 'c:/cygwin/tmp/b'
1
empty_dir 'c:/cygwin/tmp/c'
0</lang>
Java
This method does not check that the path given is actually a directory. If a path to a normal file is given, it will throw a NullPointerException. File.listFiles() does not count the "." and ".." entries.
<lang java5>import java.nio.file.Paths;
//... other class code here
public static boolean isEmptyDir(String dirName){
return Paths.get(dirName).toFile().listFiles().length == 0;
}</lang>
JavaScript
The ECMAScript standard itself defines no IO interface – the following example makes use of the Node.js file IO library.
<lang javascript>// Node.js v14.15.4 const { readdirSync } = require("fs"); const emptydir = (path) => readdirSync(path).length == 0;
// tests, run like node emptydir.js [directories] for (let i = 2; i < process.argv.length; i ++) {
let dir = process.argv[i];
console.log(`${dir}: ${emptydir(dir) ? "" : "not "}empty`)
}</lang>
Julia
<lang julia># v0.6.0 isemptydir(dir::AbstractString) = isempty(readdir(dir))
@show isemptydir(".") @show isemptydir("/home") </lang>
- Output:
isemptydir(".") = false
isemptydir("/home") = false
Kotlin
<lang scala>// version 1.1.4
import java.io.File
fun main(args: Array<String>) {
val dirPath = "docs" // or whatever
val isEmpty = (File(dirPath).list().isEmpty())
println("$dirPath is ${if (isEmpty) "empty" else "not empty"}")
}</lang>
Lasso
<lang Lasso>dir('has_content') -> isEmpty
'
'
dir('no_content') -> isEmpty</lang>
- Output:
false true
Liberty BASIC
<lang lb> dim info$(10, 10) files "c:\", info$()
qtyFiles=val(info$(0,0)) n = qtyFiles+1 'begin directory info
folder$ = info$(n,0) 'path to first directory in c:
files folder$, info$() 're-fill array with data from sub folder
if val(info$(0,0)) + val(info$(0, 1)) <> 0 then
print "Folder ";folder$;" is not empty."
else
print "Folder ";folder$;" is empty."
end if </lang>
Lingo
<lang lingo>on isDirEmpty (dir)
return getNthFileNameInFolder(dir, 1) = EMPTY
end</lang>
Lua
Pure Lua function based on snipplet from Stack Overflow[1]. <lang lua> function scandir(directory) local i, t, popen = 0, {}, io.popen local pfile = popen('ls -a "'..directory..'"') for filename in pfile:lines() do if filename ~= '.' and filename ~= '..' then i = i + 1 t[i] = filename end end pfile:close() return t end
function isemptydir(directory) return #scandir(directory) == 0 end </lang>
Using lfs[2] library. <lang lua> function isemptydir(directory,nospecial) for filename in require('lfs').dir(directory) do if filename ~= '.' and filename ~= '..' then return false end end return true end </lang>
Maple
<lang Maple> emptydirectory := proc (dir) is(listdir(dir) = [".", ".."]); end proc; </lang>
Mathematica / Wolfram Language
<lang Mathematica>EmptyDirectoryQ[x_] := (SetDirectory[x]; If[FileNames[] == {}, True, False])
Example use: EmptyDirectoryQ["C:\\Program Files\\Wolfram Research\\Mathematica\\9"] ->True</lang>
MATLAB / Octave
<lang Matlab>
function x = isEmptyDirectory(p)
if isdir(p)
f = dir(p)
x = length(f)>2;
else
error('Error: %s is not a directory');
end;
end;
</lang>
min
<lang min>(ls bool not) :empty-dir?</lang>
MS-DOS
Since you cannot remove a directory that isn't empty, one way to check is to attempt to remove it. <lang dos>C:\>rd GAMES Unable to remove: GAMES.
C:\></lang>
Nanoquery
<lang nanoquery>def isempty(dirname)
return len(new(Nanoquery.IO.File).listDir(dirname)) = 0
end</lang>
Nemerle
<lang Nemerle>using System.IO; using System.Console;
module EmptyDirectory {
IsDirectoryEmpty(dir : string) : bool
{
Directory.GetFileSystemEntries(dir).Length == 0
}
Main(args : array[string]) : void
{
foreach (dir in args) {
when (Directory.Exists(dir)) {
WriteLine("{0} {1} empty.", dir, if (IsDirectoryEmpty(dir)) "is" else "is not");
}
}
}
}</lang>
NewLISP
<lang NewLISP> (define (empty-dir? path-to-check) (empty? (clean (lambda (x) (or (= "." x) (= ".." x))) (directory path-to-check))) ) </lang>
Nim
<lang nim>import os, rdstdin
var empty = true for f in walkDir(readLineFromStdin "directory: "):
empty = false break
echo empty</lang>
Alternatively:
<lang nim>import os, sequtils
proc isEmptyDir(dir: string): bool =
toSeq(walkdir dir).len == 0
echo isEmptyDir("/tmp") # false - there is always something in "/tmp" echo isEmptyDir("/temp") # true - "/temp" does not exist</lang>
Objeck
<lang objeck>function : IsEmptyDirectory(dir : String) ~ Bool {
return Directory->List(dir)->Size() = 0;
}</lang>
OCaml
<lang ocaml>let is_dir_empty d =
Sys.readdir d = [| |]</lang>
ooRexx
<lang oorexx>Call test 'D:\nodir' /* no such directory */ Call test 'D:\edir' /* an empty directory */ Call test 'D:\somedir' /* directory with 2 files */ Call test 'D:\somedir','S' /* directory with 3 files */ Exit test: Parse Arg fd,nest If SysIsFileDirectory(fd)=0 Then
Say 'Directory' fd 'not found'
Else Do
ret=SysFileTree(fd'\*.*','X', 'F'nest)
If x.0=0 Then
say 'Directory' fd 'is empty'
Else Do
If nest= Then
say 'Directory' fd 'contains' x.0 'files'
Else
say 'Directory' fd 'contains' x.0 'files (some nested)'
End
End
Return</lang>
- Output:
Directory D:\nodir not found Directory D:\edir is empty Directory D:\somedir contains 2 files Directory D:\somedir contains 3 files (some nested)
PARI/GP
Define a function chkdir(<path>) that returns count of entries in a directory (without . and .. ): <lang parigp>chkdir(d)=extern(concat(["[ -d '",d,"' ]&&ls -A '",d,"'|wc -l||echo -1"]))</lang>
On error chkdir(...) returns -1 else count of entries. If chkdir() == 0 then directory is empty. So define an additional function: <lang parigp>dir_is_empty(d)=!chkdir(d)</lang>
Output:
chkdir("/tmp"): 52
dir_is_empty("/tmp"): 0
Perl
Simple version
<lang perl>sub dir_is_empty {!<$_[0]/*>}</lang> This version however doesn't catch 'hidden' files that start with a dot.
May be good for quick one-liners or in some special cases when you are sure that there are no 'hidden' files or they doesn't play any role.
Unfortunalety, BSD glob() doesn't handle inverted character class. If it did, this pattern could be used: {.[^.],}* (this works well in bash). But it doesn't, so there's a
Thorough version
<lang perl>use IO::Dir; sub dir_is_empty { !grep !/^\.{1,2}\z/, IO::Dir->new(@_)->read }</lang>
Phix
<lang Phix>procedure test(string filename) string msg
switch get_file_type(filename) do
case FILETYPE_UNDEFINED: msg = "is UNDEFINED"
case FILETYPE_NOT_FOUND: msg = "is NOT_FOUND"
case FILETYPE_FILE: msg = "is a FILE"
case FILETYPE_DIRECTORY:
sequence d = dir(filename)
integer count = 0
for i=1 to length(d) do
if not find(d[i][D_NAME],{".",".."}) then
count += 1
end if
end for
if count=0 then
msg = "is an empty directory"
else
msg = sprintf("is a directory containing %d files",{count})
end if
end switch
printf(1,"%s %s\n",{filename,msg})
end procedure
constant tests = {"C:\\xx","C:\\not_there","C:\\Program Files (x86)\\Phix\\p.exe","C:\\Windows"} for i=1 to length(tests) do
test(tests[i])
end for</lang>
- Output:
C:\xx is an empty directory C:\not_there is NOT_FOUND C:\Program Files (x86)\Phix\p.exe is a FILE C:\Windows is a directory containing 110 files
PHP
Any improvements welcome but here is a starting point for PHP <lang php>
$dir = 'path_here';
if(is_dir($dir)){
//scandir grabs the contents of a directory and array_diff is being used to filter out .. and .
$list = array_diff(scandir($dir), array('..', '.'));
//now we can just use empty to check if the variable has any contents regardless of it's type
if(empty($list)){
echo 'dir is empty';
}
else{
echo 'dir is not empty';
}
} else{
echo 'not a directory';
}
</lang>
PicoLisp
<lang PicoLisp>(prinl "myDir is" (and (dir "myDir") " not") " empty")</lang>
- Output:
myDir is not empty
PowerShell
<lang PowerShell> $path = "C:\Users" if((Dir $path).Count -eq 0) {
"$path is empty"
} else {
"$path is not empty"
} </lang> Output:
C:\Users is not empty
Prolog
<lang Prolog>non_empty_file('.'). non_empty_file('..').
empty_dir(Dir) :- directory_files(Dir, Files), maplist(non_empty_file, Files).</lang>
PureBasic
<lang purebasic>Procedure isDirEmpty(path$)
If Right(path$, 1) <> "\": path$ + "\": EndIf
Protected dirID = ExamineDirectory(#PB_Any, path$, "*.*")
Protected result
If dirID
result = 1
While NextDirectoryEntry(dirID)
If DirectoryEntryType(dirID) = #PB_DirectoryEntry_File Or (DirectoryEntryName(dirID) <> "." And DirectoryEntryName(dirID) <> "..")
result = 0
Break
EndIf
Wend
FinishDirectory(dirID)
EndIf
ProcedureReturn result
EndProcedure
Define path$, result$
path$ = PathRequester("Choose a path", "C:\") If path$
If isDirEmpty(path$)
result$ = " is empty."
Else
result$ = " is not empty."
EndIf
MessageRequester("Empty directory test", #DQUOTE$ + path$ + #DQUOTE$ + result$)
EndIf </lang>
- Output:
when selecting directories "L
"L:\vv\6\" is empty. "L:\vv\" is not empty.
Python
<lang python>import os; if os.listdir(raw_input("directory")):
print "not empty"
else:
print "empty"
</lang>
Racket
<lang racket>
- lang racket
(empty? (directory-list "some-directory")) </lang>
Raku
(formerly Perl 6) <lang perl6>sub dir-is-empty ($d) { not dir $d }</lang> The dir function returns a lazy list of filenames, excluding "." and ".." automatically. Any boolean context (in this case the not function) will do just enough work on the lazy list to determine whether there are any elements, so we don't have to count the directory entries, or even read them all into memory, if there are more than one buffer's worth.
REXX
The following program was tested in a DOS window under Windows/XP and should work for all Microsoft Windows. <lang rexx>/*REXX pgm checks to see if a directory is empty; if not, lists entries.*/ parse arg xdir; if xdir= then xdir='\someDir' /*Any DIR? Use default.*/ @.=0 /*default in case ADDRESS fails. */ trace off /*suppress REXX err msg for fails*/ address system 'DIR' xdir '/b' with output stem @. /*issue the DIR cmd.*/ if rc\==0 then do /*an error happened?*/
say '***error!*** from DIR' xDIR /*indicate que pasa.*/
say 'return code=' rc /*show the ret Code.*/
exit rc /*exit with the RC.*/
end /* [↑] bad address.*/
- =@.rc /*number of entries.*/
if #==0 then #=' no ' /*use a word, ¬zero.*/ say center('directory ' xdir " has " # ' entries.',79,'─') exit @.0+rc /*stick a fork in it, we're done.*/</lang>
- Output:
when the following input was used
──────────────────────directory temp has 10 entries.───────────────────────
- Output:
when the following input was used
───────────────────directory \someDir has no entries.───────────────────
Ring
<lang ring> myList = dir("C:\Ring\bin") if len(myList) > 0 see "C:\Ring\bin is not empty" + nl else see "C:\Ring\bin is empty" + nl ok </lang>
Ruby
Raises a SystemCallError if the named directory doesn’t exist. <lang ruby>Dir.entries("testdir").empty? </lang>
Run BASIC
<lang runbasic>files #f, DefaultDir$ + "\*.*" ' open some directory.
print "hasanswer: ";#f HASANSWER() ' if it has an answer it is not MT print "rowcount: ";#f ROWCOUNT() ' if not MT, how many files?</lang>
Rust
<lang rust>use std::fs::read_dir; use std::error::Error;
fn main() {
for path in std::env::args().skip(1) { // iterate over the arguments, skipping the first (which is the executable)
match read_dir(path.as_str()) { // try to read the directory specified
Ok(contents) => {
let len = contents.collect::<Vec<_>>().len(); // calculate the amount of items in the directory
if len == 0 {
println!("{} is empty", path);
} else {
println!("{} is not empty", path);
}
},
Err(e) => { // If the attempt failed, print the corresponding error msg
println!("Failed to read directory \"{}\": {}", path, e.description());
}
}
}
}</lang>
Scala
<lang scala>import java.io.File
def isDirEmpty(file:File) : Boolean =
return file.exists && file.isDirectory && file.list.isEmpty</lang>
Seed7
<lang seed7>$ include "seed7_05.s7i";
include "osfiles.s7i";
const func boolean: dirEmpty (in string: dirName) is
return fileType(dirName) = FILE_DIR and length(readDir(dirName)) = 0;
const proc: main is func
begin
writeln(dirEmpty("somedir"));
end func;</lang>
SenseTalk
The filesAndFolders function returns an empty list if a directory is empty (and does not return '.' or '..'). <lang sensetalk>put the temporary folder & "NewFolder" into newFolderPath make folder newFolderPath -- create a new empty directory
if the filesAndFolders in newFolderPath is empty then put "Directory " & newFolderPath & " is empty!" else put "Something is present in " & newFolderPath end if </lang>
- Output:
Directory /var/folders/dp/0nmm3z4m8xl5m3008k8db78h0000gn/T/NewFolder is empty!
Sidef
Built-in method: <lang ruby>Dir.new('/my/dir').is_empty; # true, false or nil</lang>
User-defined function: <lang ruby>func is_empty(dir) {
dir.open(\var dir_h) || return nil;
dir_h.each { |file|
file ~~ ['.', '..'] && next;
return false;
};
return true;
};</lang>
Standard ML
<lang sml>fun isDirEmpty(path: string) =
let
val dir = OS.FileSys.openDir path
val dirEntryOpt = OS.FileSys.readDir dir
in
(
OS.FileSys.closeDir(dir);
case dirEntryOpt of
NONE => true
| _ => false
)
end;</lang>
Tcl
<lang tcl>proc isEmptyDir {dir} {
# Get list of _all_ files in directory
set filenames [glob -nocomplain -tails -directory $dir * .*]
# Check whether list is empty (after filtering specials)
expr {![llength [lsearch -all -not -regexp $filenames {^\.\.?$}]]}
}</lang>
UNIX Shell
<lang bash>
- !/bin/sh
DIR=/tmp/foo [ `ls -a $DIR|wc -l` -gt 2 ] && echo $DIR is NOT empty || echo $DIR is empty </lang>
VBA
<lang vb>Sub Main()
Debug.Print IsEmptyDirectory("C:\Temp")
Debug.Print IsEmptyDirectory("C:\Temp\")
End Sub
Private Function IsEmptyDirectory(D As String) As Boolean Dim Sep As String
Sep = Application.PathSeparator D = IIf(Right(D, 1) <> Sep, D & Sep, D) IsEmptyDirectory = (Dir(D & "*.*") = "")
End Function</lang>
VBScript
<lang vb> Function IsDirEmpty(path) IsDirEmpty = False Set objFSO = CreateObject("Scripting.FileSystemObject") Set objFolder = objFSO.GetFolder(path) If objFolder.Files.Count = 0 And objFolder.SubFolders.Count = 0 Then IsDirEmpty = True End If End Function
'Test WScript.StdOut.WriteLine IsDirEmpty("C:\Temp") WScript.StdOut.WriteLine IsDirEmpty("C:\Temp\test") </lang>
- Output:
False True
Wren
<lang ecmascript>import "io" for Directory
var isEmptyDir = Fn.new { |path|
if (!Directory.exists(path)) Fiber.abort("Directory at '%(path)' does not exist.")
return Directory.list(path).count == 0
}
var path = "test" var empty = isEmptyDir.call(path) System.print("'%(path)' is %(empty ? "empty" : "not empty")")</lang>
- Output:
'test' is an empty directory I made earlier.
'test' is empty
zkl
<lang zkl>path:="Empty"; File.isDir(path).println(); File.mkdir(path); File.isDir(path).println(); File.glob(path+"/*").println(); // show contents of directory</lang>
- Output:
False True L()
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