Functional\Exceptions\InvalidArgumentException::assertCollection PHP Method

assertCollection() public static method

public static assertCollection ( $collection, $callee, $parameterPosition )
    public static function assertCollection($collection, $callee, $parameterPosition)
    {
        self::assertCollectionAlike($collection, 'Traversable', $callee, $parameterPosition);
    }

Usage Example

Example #1
0
/**
 * Recombines arrays by index (column) and applies a callback optionally
 *
 * When the input collections are different lengths the resulting collections
 * will all have the length which is required to fit all the keys
 *
 * @param $args array|Traversable $collection One or more callbacks
 * @return array
 */
function zip_all(...$args)
{
    /** @var callable|null $callback */
    $callback = null;
    if (is_callable(end($args))) {
        $callback = array_pop($args);
    }
    foreach ($args as $position => $arg) {
        InvalidArgumentException::assertCollection($arg, __FUNCTION__, $position + 1);
    }
    $resultKeys = [];
    foreach ($args as $arg) {
        foreach ($arg as $index => $value) {
            $resultKeys[] = $index;
        }
    }
    $resultKeys = array_unique($resultKeys);
    $result = [];
    foreach ($resultKeys as $key) {
        $zipped = [];
        foreach ($args as $arg) {
            $zipped[] = isset($arg[$key]) ? $arg[$key] : null;
        }
        $result[$key] = $zipped;
    }
    if ($callback !== null) {
        foreach ($result as $key => $column) {
            $result[$key] = $callback(...$column);
        }
    }
    return $result;
}
All Usage Examples Of Functional\Exceptions\InvalidArgumentException::assertCollection