1  var 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   */
14  function 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  
26  module.exports = baseWhile;