aboutsummaryrefslogtreecommitdiff
path: root/node_modules/lodash/_baseWhile.js
blob: 07eac61b9893bd238fd931d19f9f71ec469f1fd1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
var baseSlice = require('./_baseSlice');

/**
 * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
 * without support for iteratee shorthands.
 *
 * @private
 * @param {Array} array The array to query.
 * @param {Function} predicate The function invoked per iteration.
 * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Array} Returns the slice of `array`.
 */
function baseWhile(array, predicate, isDrop, fromRight) {
  var length = array.length,
      index = fromRight ? length : -1;

  while ((fromRight ? index-- : ++index < length) &&
    predicate(array[index], index, array)) {}

  return isDrop
    ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
    : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
}

module.exports = baseWhile;