pickAll: tiny underscore extension by @svammel

pickAll.js

/*
 * pickAll: tiny underscore extension by @svammel
 *
 * Example:
 *
 *   var users = [
 *     { "user": "john", "email": "[email protected]", "url": "www.john.com" },
 *     { "user": "pete", "email": "[email protected]", "url": "www.pete.com" }
 *   ];
 *
 *   _.pickAll(users, 'user', 'email');
 *
 * Will return the same array but with only the fields 'user' and 'email' for
 * each element.
 *
 */

if(typeof _ === 'undefined') throw "requires underscore";
_.pickAll = function(arr) {
  var args = Array.prototype.slice.call(arguments, 1);
  return _.map(arr, function(el) {
    return _.pick.apply(null, [ el ].concat(args));
  });
};