iframe-proxy | Sunbelt Computer Software

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 * Copyright (C) 2011-2015 by Lars Strojny <lstrojny@php.net>
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
namespace Functional;
use Functional\Exceptions\InvalidArgumentException;
use Traversable;
 * Produces a new array of elements by mapping each element in collection through a transformation function (callback).
 * Callback arguments will be element, index, collection
 * @param Traversable|array $collection
 * @param callable $callback
 * @return array
function map($collection, callable $callback)
    InvalidArgumentException::assertCollection($collection, __FUNCTION__, 1);
    $aggregation = [];
    foreach ($collection as $index => $element) {
        $aggregation[$index] = $callback($element, $index, $collection);
    return $aggregation;

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