Creating implementation for idiom 273 : Check if folder is empty

Idiom

# 273 Check if folder is empty

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Set the boolean b to true if the directory at filepath p is empty (i.e. doesn't contain any other files and directories)

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import 'dart:io';

var b = await Directory(p).list().isEmpty;

def main(p) do
  b = File.ls!(p) == []
end

import "os"

dir, err := os.Open(p)
if err != nil {
	panic(err)
}
defer dir.Close()
_, err = dir.Readdirnames(1)
b := err == io.EOF

(let ((b (directory p)))
  (if (null b) t nil))

$iterator = new FilesystemIterator($p, FilesystemIterator::SKIP_DOTS);
$b = (iterator_count($iterator) === 0);

uses FileUtil;

with FindAllFiles(p, AllFilesMask, False) do
try
  b := DirectoryExists(p) and (Count = 0);
finally
  Free;
end;

opendir(my $dh, $p) || die($!);
my $b = scalar(grep { !/^[\.]{1,2}$/ } readdir($dh)) ? 1 : 0;
closedir($dh);

import os

b = os.listdir(p) == []

b = Dir.empty?(p)

use std::fs;

let b = fs::read_dir(p).unwrap().count() == 0;