ecmascript-harmony

Trying to use a new ES6 based node.js ODM for Mongo (Robe http://hiddentao.github.io/robe/ ) Getting "unexpected strict mode reserved word" error. Am I dong something wrong here? test0.js "use strict"; // Random ES6 (works) { let a = 'I am declared inside an anonymous block'; } var Robe = require('robe'); // :( var db1 = yield Robe.connect('127.0.0.1'); Run it: C:\TestWS>node --version v0.11.10 C:\TestWS>node --harmony test0.js C:\TestWS\test0.js:12 var db1 = yield Robe.connect('127.0.0.1'); ^^^^^ SyntaxError: Unexpected strict mode reserved word at exports.runInThisContext (vm.js:69:16) at

I wanted to do something which is very straight-forward using Object.assign . var firstObj = {name : "Saba H.", rollNo : 1}; var secondObj = {college : "WCE"}; var wholeObj = Object.assign(firstObj, secondObj); console.log(wholeObj); // {name : "Saba H.", rollNo : 1, college : "WCE"} As Object.assign is part of ECMAScript6 harmony proposal and not supported across many browsers, is it possible to do with ES5? If not then is there any micro library? In underscore.js you can use like, _.extend(firstObj, secondObj); In jQuery, you can use, $.extend({},firstObj,secondObj); In pure javascipt, you

How would I make an iterator out of an ES6 class in the same manner as JS1.7 SomeClass.prototype.__iterator__ = function() {...} syntax? [EDIT 16:00] The following works: class SomeClass { constructor() { } *[Symbol.iterator]() { yield '1'; yield '2'; } //*generator() { //} } an_instance = new SomeClass(); for (let v of an_instance) { console.log(v); } WebStorm flags *[Symbol.iterator]() with a 'function name expected' warning directly following the asterix, but otherwise this compiles and runs fine with Traceur. (Note WebStorm does not generate any errors for *generator() .) Define a suitable

The problem is： longhao33@hePC:~$ node --harmony test.js /home/longhao33/test.js:1 (function (exports, require, module, __filename, __dirname) { let str = 'es666666666666'; ^^^ SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode at exports.runInThisContext (vm.js:53:16) at Module._compile (module.js:413:25) at Object.Module._extensions..js (module.js:452:10) at Module.load (module.js:355:32) at Function.Module._load (module.js:310:12) at Function.Module.runMain (module.js:475:10) at startup (node.js:117:18) at node.js:951:3 But "let" is

I thought that they were the same thing for a while, but I often see phrasing in blogs or in answers here that seems to imply that there is a difference between the two. Even SO has two distinct tags, but their description doesn't show any clear difference. I searched around for a bit and it only added to the confusion as it seems that I am not the only one who's unsure about what means what. Is there an official definition for both of these terms, perhaps defined by Ecma International themselves? If not, is there at least a commonly accepted definition? As @JamesAllardice already said in the

This question already has an answer here: How do I access previous promise results in a .then() chain? 17 answers I'm using straight ES6 Promises (with the es6-promise polyfill library) and I'm running into a problem with accessing results from previous promises in chained ones. This problem is identical in the context of Angular/Q, but I'm dissatisfied with the answer and wanted to see if there's a better way: How to access result from the previous promise in AngularJS promise chain? Consider the code snippet below: Student.find().then(function(student) { return HelpRequest.findByStudent

I've been searching for an answer but I'm only getting results regarding the Google maps API. I'm trying to use a map in JavaScript to map an integer to a string. Everything is working fine in Firefox but in chrome I get an error message in the console: Uncaught ReferenceError: Map is not defined Below is a piece of reference code: var NameMap; var DistanceMap; function FillMaps(){ NameMap = new Map(); DistanceMap = new Map(); NameMap.set(01, "Araba/Álava"); } function CheckName(_field){ var value = document.getElementsByName(_field.name).item(0).value; var location = value.charAt(0) + value