56 lines
1.6 KiB
PHP
56 lines
1.6 KiB
PHP
<?php
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// {{{ License
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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// }}}
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/**
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* Functional utilities
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*
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* @package GNUsocial
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* @category Util
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*
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* @author Hugo Sales <hugo@fc.up.pt>
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* @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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namespace App\Util;
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use Functional as F;
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abstract class Functional
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{
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/**
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* Call $func with only abs($count) arguments, taken either from the
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* left or right depending on the sign
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*
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* @param callable $func
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* @param int $count
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*
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* @return callable
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*/
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public static function arity(callable $func, int $count): callable
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{
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return function (...$args) use ($func, $count) {
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if ($count > 0) {
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return call_user_func_array($func, F\take_left($args, $count));
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}
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return call_user_func_array($func, F\take_right($args, -$count));
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};
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}
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}
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