lodash/_baseOrderBy.js

import arrayMap from './_arrayMap.js';
import baseIteratee from './_baseIteratee.js';
import baseMap from './_baseMap.js';
import baseSortBy from './_baseSortBy.js';
import baseUnary from './_baseUnary.js';
import compareMultiple from './_compareMultiple.js';
import identity from './identity.js';

/**
 * The base implementation of `_.orderBy` without param guards.
 *
 * @private
 * @param {Array|Object} collection The collection to iterate over.
 * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
 * @param {string[]} orders The sort orders of `iteratees`.
 * @returns {Array} Returns the new sorted array.
 */
function baseOrderBy(collection, iteratees, orders) {
  var index = -1;
  iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(baseIteratee));

  var result = baseMap(collection, (value, key, collection) => {
    var criteria = arrayMap(iteratees, iteratee => iteratee(value));
    return { 'criteria': criteria, 'index': ++index, 'value': value };
  });

  return baseSortBy(result, (object, other) => compareMultiple(object, other, orders));
}

export default baseOrderBy;