lodash/internal/baseSortByOrder.js

define(['./baseEach', './baseSortBy', './compareMultiple', './isLength'], function(baseEach, baseSortBy, compareMultiple, isLength) {

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

  /**
   * The base implementation of `_.sortByOrder` without param guards.
   *
   * @private
   * @param {Array|Object|string} collection The collection to iterate over.
   * @param {string[]} props The property names to sort by.
   * @param {boolean[]} orders The sort orders of `props`.
   * @returns {Array} Returns the new sorted array.
   */
  function baseSortByOrder(collection, props, orders) {
    var index = -1,
        length = collection.length,
        result = isLength(length) ? Array(length) : [];

    baseEach(collection, function(value) {
      var length = props.length,
          criteria = Array(length);

      while (length--) {
        criteria[length] = value == null ? undefined : value[props[length]];
      }
      result[++index] = { 'criteria': criteria, 'index': index, 'value': value };
    });

    return baseSortBy(result, function(object, other) {
      return compareMultiple(object, other, orders);
    });
  }

  return baseSortByOrder;
});