tarsana / functional

 * @param  array $list

 * @return array

 */

function takeWhile() {

    static $takeWhile = false;

    $takeWhile = $takeWhile ?: curry(function($predicate, $list) {

        $index = 0;

        $size = length($list);

        while ($index < $size && $predicate($list[$index]))

            $index ++;

        return array_slice($list, 0, $index);

    });

    return _apply($takeWhile, func_get_args());

}

/**

 * Same as `takeWhile` but taking elements from the end of the array.

 * @param  array $list

 * @return array

 */

function takeUntil() {

    static $takeUntil = false;

    $takeUntil = $takeUntil ?: curry(function($predicate, $list) {

        $index = 0;

        $size = length($list);

        while ($index < $size && !$predicate($list[$index]))

            $index ++;

        return array_slice($list, 0, $index);

    });

    return _apply($takeUntil, func_get_args());

}

/**

 * Same as `takeUntil` but takes elements from the end of the array.

 * @param  array $list

 * @return array

 */

function removeWhile() {

    static $removeWhile = false;

    $removeWhile = $removeWhile ?: curry(function($predicate, $list) {

        $index = 0;

        $size = length($list);

        while ($index < $size && $predicate($list[$index]))

            $index ++;

        return array_slice($list, $index);

    });

    return _apply($removeWhile, func_get_args());

}

/**

 * Same as `removeWhile` but removes elements from the end of the array.

 * @param  array $list

 * @return array

 */

function removeUntil() {

    static $removeUntil = false;

    $removeUntil = $removeUntil ?: curry(function($predicate, $list) {

        $index = 0;

        $size = length($list);

        while ($index < $size && !$predicate($list[$index]))

            $index ++;

        return array_slice($list, $index);

    });

    return _apply($removeUntil, func_get_args());

}

/**

 * Same as `removeUntil` but removes elements from the end of the array.