Walk a directory/Non-recursively: Difference between revisions

=={{header|Wren}}==

{{libheader|Wren-pattern}}

<lang ecmascript>import "io" for Directory

import "/pattern" for Pattern

var walk = Fn.new { |dir, pattern|

if (!Directory.exists(dir)) Fiber.abort("Directory does not exist.")

var files = Directory.list(dir)

return files.where { |f| pattern.isMatch(f) }

}

// get all C header files beginning with 'a' or 'b'

var p = Pattern.new("[a|b]+0^..h", Pattern.whole)

for (f in walk.call("/usr/include", p)) System.print(f)</lang>

{{out}}

<pre>

aio.h

aliases.h

alloca.h

ar.h

argp.h

argz.h

asoundlib.h

assert.h

byteswap.h

</pre>