dropWhile.js
 1  var baseIteratee = require('./_baseIteratee'),
 2      baseWhile = require('./_baseWhile');
 3  
 4  /**
 5   * Creates a slice of `array` excluding elements dropped from the beginning.
 6   * Elements are dropped until `predicate` returns falsey. The predicate is
 7   * invoked with three arguments: (value, index, array).
 8   *
 9   * @static
10   * @memberOf _
11   * @since 3.0.0
12   * @category Array
13   * @param {Array} array The array to query.
14   * @param {Function} [predicate=_.identity] The function invoked per iteration.
15   * @returns {Array} Returns the slice of `array`.
16   * @example
17   *
18   * var users = [
19   *   { 'user': 'barney',  'active': false },
20   *   { 'user': 'fred',    'active': false },
21   *   { 'user': 'pebbles', 'active': true }
22   * ];
23   *
24   * _.dropWhile(users, function(o) { return !o.active; });
25   * // => objects for ['pebbles']
26   *
27   * // The `_.matches` iteratee shorthand.
28   * _.dropWhile(users, { 'user': 'barney', 'active': false });
29   * // => objects for ['fred', 'pebbles']
30   *
31   * // The `_.matchesProperty` iteratee shorthand.
32   * _.dropWhile(users, ['active', false]);
33   * // => objects for ['pebbles']
34   *
35   * // The `_.property` iteratee shorthand.
36   * _.dropWhile(users, 'active');
37   * // => objects for ['barney', 'fred', 'pebbles']
38   */
39  function dropWhile(array, predicate) {
40    return (array && array.length)
41      ? baseWhile(array, baseIteratee(predicate, 3), true)
42      : [];
43  }
44  
45  module.exports = dropWhile;