lodash/array/dropRightWhile.js

define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallback, baseSlice) {

  /**
   * Creates a slice of `array` excluding elements dropped from the end.
   * Elements are dropped until `predicate` returns falsey. The predicate is
   * bound to `thisArg` and invoked with three arguments; (value, index, array).
   *
   * If a property name is provided for `predicate` the created `_.property`
   * style callback returns the property value of the given element.
   *
   * If a value is also provided for `thisArg` the created `_.matchesProperty`
   * style callback returns `true` for elements that have a matching property
   * value, else `false`.
   *
   * If an object is provided for `predicate` the created `_.matches` style
   * callback returns `true` for elements that match the properties of the given
   * object, else `false`.
   *
   * @static
   * @memberOf _
   * @category Array
   * @param {Array} array The array to query.
   * @param {Function|Object|string} [predicate=_.identity] The function invoked
   *  per iteration.
   * @param {*} [thisArg] The `this` binding of `predicate`.
   * @returns {Array} Returns the slice of `array`.
   * @example
   *
   * _.dropRightWhile([1, 2, 3], function(n) {
   *   return n > 1;
   * });
   * // => [1]
   *
   * var users = [
   *   { 'user': 'barney',  'active': true },
   *   { 'user': 'fred',    'active': false },
   *   { 'user': 'pebbles', 'active': false }
   * ];
   *
   * // using the `_.matches` callback shorthand
   * _.pluck(_.dropRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user');
   * // => ['barney', 'fred']
   *
   * // using the `_.matchesProperty` callback shorthand
   * _.pluck(_.dropRightWhile(users, 'active', false), 'user');
   * // => ['barney']
   *
   * // using the `_.property` callback shorthand
   * _.pluck(_.dropRightWhile(users, 'active'), 'user');
   * // => ['barney', 'fred', 'pebbles']
   */
  function dropRightWhile(array, predicate, thisArg) {
    var length = array ? array.length : 0;
    if (!length) {
      return [];
    }
    predicate = baseCallback(predicate, thisArg, 3);
    while (length-- && predicate(array[length], length, array)) {}
    return baseSlice(array, 0, length + 1);
  }

  return dropRightWhile;
});