View Subcategory
Files
Directories

Process each file in a directory

ruby
directory = '/tmp' ; Dir.foreach(directory) {|file| puts "#{file}"}
java
for (File file : (new File("c:\\")).listFiles()) process(file);
perl
use File::Glob;

for (<*>) {
process_file($_) if (-f);
}
groovy
dir.eachFile{ f -> process(f) }
scala
for (file <- new File("c:\\").listFiles) { processFile(file) }
python
import os
results = (process(f) for f in os.listdir(".") if os.path.isfile(f))
cpp
for each(String^ filename in IO::Directory::GetFiles(dirname)) process(filename);
fsharp
let dirname = "c:\\"

let processFile filename = printfn "%s" filename
for filename in Directory.GetFiles(dirname) do processFile filename done
let dirname = "c:\\"

Directory.GetFiles(dirname) |> Array.iter (fun filename -> printfn "%s" filename)
erlang
% File basenames only - many tasks require absolute paths to work
lists:foreach(fun (FileOrDirPath) -> Worker(FileOrDirPath) end, file:list_dir(Directory)).
% Absolute paths provided - will accomodate most tasks
lists:foreach(fun (FileOrDirPath) -> Worker(FileOrDirPath) end, list_dir_path(Directory)).
php
if ($dh = opendir($dir)) { // if we have access
while (($file = readdir($dh)) !== false) { // as long as there is a file
echo "name: $file\n"; // echo its name
}
closedir($dh); // close the dir
}

Process each file in a directory recursively

ruby
def procdir(dirname)
Dir.foreach(dirname) do |dir|
dirpath = dirname + '/' + dir
if File.directory?(dirpath) then
if dir != '.' && dir != '..' then
puts "DIRECTORY: #{dirpath}" ; procdir(dirpath)
end
else
puts "FILE: #{dirpath}"
end
end
end

# ------

procdir('/tmp')
java
processDirectory(new File("c:\\"));
perl
use File::Glob;

process_directory(".");

sub process_directory {
my $dir = shift;
for my $file (<$dir/*>) {
next unless (-r $file);
if (-f $file) {
process_file($file);
} elsif (-d $file) {
process_directory($file);
}
}
}
groovy
dir.eachFileRecurse{ f -> process(f) }
scala
processDirectory(new File("c:\\"))
python
import os
results = (process(os.path.join(p, n)) for p,d,l in os.walk(".") for n in l)
cpp
void processFile(String^ filename) { Console::WriteLine("{0}", filename); }

void processDirectory(String^ dirname)
{
for each(String^ filename in IO::Directory::GetFiles(dirname)) processFile(filename);
for each(String^ subdirname in IO::Directory::GetDirectories(dirname)) processDirectory(subdirname);
}

int main()
{
processDirectory("c:\\");
}
fsharp
let processDirectory dirname proc =
let rec processDirectory' dirname' =
Directory.GetFiles(dirname') |> Array.iter proc
Directory.GetDirectories(dirname') |> Array.iter processDirectory'
processDirectory' dirname

// ------

let dirname = "c:\\"

processDirectory dirname (fun filename -> printfn "%s" filename)
erlang
filelib:fold_files(Directory, ".*", true, fun (FileOrDirPath, Acc) -> Worker(FileOrDirPath), Acc end, []).
process_dir(Directory, Worker).
php

if ($dir_handle = opendir($dir))
list_dir($dir_handle);

function list_dir($dh) {
// as long as we can read the dir
while (($file = readdir($dh)) !== false) {
// if it's a dir and it's not the current dir nor the above dir
if (is_dir($file) && $file != '.' && $file !='..') {
// open the dir, print it's name and all files inside
$handle = opendir($file);
echo $file."\n";
list_dir($handle);
// if it's a simple file
} else if ($file != '.' && $file !='..') {
// type it's name
echo $file."\n";
}
}
closedir($dir_handle); // close the dirs
}