1var baseSlice = require('./_baseSlice');
2
3/**
4 * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
5 * without support for iteratee shorthands.
6 *
7 * @private
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`.
13 */
14function baseWhile(array, predicate, isDrop, fromRight) {
15  var length = array.length,
16      index = fromRight ? length : -1;
17
18  while ((fromRight ? index-- : ++index < length) &&
19    predicate(array[index], index, array)) {}
20
21  return isDrop
22    ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
23    : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
24}
25
26module.exports = baseWhile;
27