Functional/Group.phpのサンプル

group.php

<?php
include './Functional/_import.php';

use Functional as F;

$users = array(
    array("name" => "gakkey","group" => "A"),
    array("name" => "hapidra","group" => "B"),
    array("name" => "oden","group" => "C"),
    array("name" => "captain","group" => "A")
);

var_dump(F\group($users,function($user){return $user["group"];}));