lodash/takeRight.js

define(['./_baseSlice', './toInteger'], function(baseSlice, toInteger) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * Creates a slice of `array` with `n` elements taken from the end.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Array
   * @param {Array} array The array to query.
   * @param {number} [n=1] The number of elements to take.
   * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
   * @returns {Array} Returns the slice of `array`.
   * @example
   *
   * _.takeRight([1, 2, 3]);
   * // => [3]
   *
   * _.takeRight([1, 2, 3], 2);
   * // => [2, 3]
   *
   * _.takeRight([1, 2, 3], 5);
   * // => [1, 2, 3]
   *
   * _.takeRight([1, 2, 3], 0);
   * // => []
   */
  function takeRight(array, n, guard) {
    var length = array ? array.length : 0;
    if (!length) {
      return [];
    }
    n = (guard || n === undefined) ? 1 : toInteger(n);
    n = length - n;
    return baseSlice(array, n < 0 ? 0 : n, length);
  }

  return takeRight;
});