• Perl

opendir my $dh, $d or die "Could not open $d for reading: $!\n";
@x = readdir $dh;
closedir $dh;

• Perl

my @x = map {basename $_} glob("$d/*");

• Go

x, err := os.ReadDir(d)

• C

struct dirent ** x = NULL;
int n = scandir (p, &x, NULL, alphasort);

• Clojure

(def x ((comp file-seq clojure.java.io/file) d))

• C++

auto directory_contents(auto path) {
  auto iterator = std::filesystem::directory_iterator(path);
  return std::vector<std::filesystem::path>(
    std::ranges::begin(iterator),
    std::ranges::end(iterator)
  );
}

auto main(int argc, char** argv) -> int {
  auto path = argc >= 2
    ? std::filesystem::path(argv[1])
    : std::filesystem::current_path();

  for (auto entry : directory_contents(path)) {
    std::cout << entry.string() << std::endl;
  }
}

• C#

var files = Directory.GetFiles(dirPath);

• D

auto x = dirEntries(d, SpanMode.shallow);

• Dart

var x = Directory(d).listSync();

• Haskell

do
  x <- listDirectory d
  -- do something with x

• JS

const x = fs.readdirSync(d)

• Java

final File directory = new File(d);
final File[] x = directory.listFiles();

• Java

String x[] = new File(d).list();

• PHP

$x = scandir($d);

• Pascal

if FindFirst(IncludeTrailingPathDelimiter(d) + '*', 
               faAnyFile and (not faDirectory), SR) = 0 then
repeat
  x.Add(SR.Name);
until FindNext(SR) <> 0;
FindClose(SR);

• Pascal

x := FindAllFiles(d, '*', False);

• Python

x = os.listdir(d)

• Ruby

x = Dir.children(d)

• Rust

let x = std::fs::read_dir(d)?.collect::<Result<Vec<_>, _>>()?;

• Rust

let x = std::fs::read_dir(d).unwrap();