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var baseFlatten = require('./_baseFlatten'),    baseOrderBy = require('./_baseOrderBy'),    baseRest = require('./_baseRest'),    isIterateeCall = require('./_isIterateeCall');
/** * Creates an array of elements, sorted in ascending order by the results of * running each element in a collection thru each iteratee. This method * performs a stable sort, that is, it preserves the original sort order of * equal elements. The iteratees are invoked with one argument: (value). * * @static * @memberOf _ * @since 0.1.0 * @category Collection * @param {Array|Object} collection The collection to iterate over. * @param {...(Function|Function[])} [iteratees=[_.identity]] *  The iteratees to sort by. * @returns {Array} Returns the new sorted array. * @example * * var users = [ *   { 'user': 'fred',   'age': 48 }, *   { 'user': 'barney', 'age': 36 }, *   { 'user': 'fred',   'age': 40 }, *   { 'user': 'barney', 'age': 34 } * ]; * * _.sortBy(users, [function(o) { return o.user; }]); * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]] * * _.sortBy(users, ['user', 'age']); * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]] */var sortBy = baseRest(function(collection, iteratees) {  if (collection == null) {    return [];  }  var length = iteratees.length;  if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {    iteratees = [];  } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {    iteratees = [iteratees[0]];  }  return baseOrderBy(collection, baseFlatten(iteratees, 1), []);});
module.exports = sortBy;