1 var baseSlice = require('./baseSlice');
4 * The base implementation of `_.dropRightWhile`, `_.dropWhile`, `_.takeRightWhile`,
5 * and `_.takeWhile` without support for callback shorthands and `this` binding.
8 * @param {Array} array The array to query.
9 * @param {Function} predicate The function invoked per iteration.
10 * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
11 * @param {boolean} [fromRight] Specify iterating from right to left.
12 * @returns {Array} Returns the slice of `array`.
14 function baseWhile(array, predicate, isDrop, fromRight) {
15 var length = array.length,
16 index = fromRight ? length : -1;
18 while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
20 ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
21 : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
24 module.exports = baseWhile;