As of June 2015: **here it is**! 

&gt; [http://www.ecma-international.org/ecma-262/**6.0**][1]




---

As of [June 2014][2]:

&gt; [The GA will vote on approving it as a Ecma standard at their **June 2015** meeting.][3]

---

At the time of writing (March 2013):

&gt;  A sixth edition of the standard is currently under development with a target date of December 2013 for completion.

http://ecma-international.org/memento/TC39-M.htm


  [1]: http://www.ecma-international.org/ecma-262/6.0/
  [2]: https://twitter.com/awbjs/status/474662357516689410
  [3]: http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts

How can I call the eat and drink method of the `Animal` class with the `myAnimal` instance in the code?

    public class Animal {
	    public void eat() {
	    	System.out.println(&quot;Animal Eats&quot;);
	    }

    	public void drink() {
    		System.out.println(&quot;Animal Drinks&quot;);
    	}
    }

-----------------------------

    public class Cat extends Animal {
        @Override
        public void eat() {
        	System.out.println(&quot;Cat Eats&quot;);
        }
        
        @Override
        public void drink() {
        	System.out.println(&quot;Cat Drinks&quot;);
        }
        
        public static void main(String[] args) {
        	Cat myCat = new Cat();
        	myCat.eat();
        	myCat.drink();
        	
        	Animal myAnimal = myCat;		
        	myAnimal.eat();
        	myAnimal.drink();
        }
    }

Output that I am getting: 

    Cat Eats
    Cat Drinks
    Cat Eats
    Cat Drinks

This is my expected output:

    Cat Eats
    Cat Drinks
    Animal Eats
    Animal Drinks

How to call the overridden method of a superclass?

I&#39;m guessing this is a pretty basic question, but I can&#39;t figure out why:

    import psycopg2
    psycopg2.connect(&quot;postgresql://postgres:postgres@localhost/postgres&quot;)

Is giving the following error:

    psycopg2.OperationalError: missing &quot;=&quot; after
    &quot;postgresql://postgres:postgres@localhost/postgres&quot; in connection info string

Any idea? According to [the docs about connection strings](http://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING) I believe it should work, however it only does like this:

    psycopg2.connect(&quot;host=localhost user=postgres password=postgres dbname=postgres&quot;)

I&#39;m using the latest psycopg2 version on Python2.7.3 on Ubuntu12.04

Connect to an URI in postgres

Sorry if this has been asked before, but I&#39;m wondering when ECMAScript v 6 will become more than a draft, and become the new standard.  Going to the [ECMA website (section 262)][1] still shows edition 5.1 as being the latest, which was released in June 2011.

Note: *(I plan on doing a talk on ECMA 262 edition 5.1 in the next couple of months and I&#39;m hoping I&#39;m not talking about out-dated material :)*


  [1]: http://www.ecma-international.org/publications/standards/Ecma-262.htm

When will ECMAScript v 6 become standard

Sorry if this has been asked before, but I'm wondering when ECMAScript v 6 will become more than a draft, and become the new standard. Going to the <a href="http://www.ecma-international.org/publications/standards/Ecma-262.htm" target="_blank" rel="noopener noreferrer">ECMA website (section 262)</a> still shows edition 5.1 as being the latest, which was released in June 2011.
Note: (I plan on doing a talk on ECMA 262 edition 5.1 in the next couple of months and I'm hoping I'm not talking about out-dated material :)

Doc:

    {
       _id: 5150a1199fac0e6910000002,
       name: &#39;some name&#39;,
       items: [{
          id: 23,
          name: &#39;item name 23&#39;
       },{
          id: 24,
          name: &#39;item name 24&#39;
       }]
    }

Is there a way to pull a specific object from an array?  I.E. how do I pull the entire item object with id 23 from the items array.

I have tried:

    db.mycollection.update({&#39;_id&#39;: ObjectId(&quot;5150a1199fac0e6910000002&quot;)}, {$pull: {id: 23}});

However I am pretty sure that I am not using &#39;pull&#39; correctly.  From what I understand pull will pull a field from an array but not an object.

Any ideas how to pull the entire object out of the array.

As a bonus I am trying to do this in mongoose/nodejs, as well not sure if this type of thing is in the mongoose API but I could not find it.

MongoDB, remove object from array

Is it possible to export a simple function from a typescript module?

[This isn&#39;t compiling for me.][1]

    module SayHi {
        export function() {
        console.log(&quot;Hi&quot;);
      }
    }
    new SayHi();


[This workitem][2] seems to imply that you cannot but doesn&#39;t flat out say it. Is it not possible? 


  [1]: http://www.typescriptlang.org/Playground/#src=module%20SayHi%20%7B%0A%20%20%20%20export%20function%28%29%20%7B%0A%09%09console.log%28%22Hi%22%29;%0A%09%7D%0A%7D%0Anew%20SayHi%28%29;%0A
  [2]: https://typescript.codeplex.com/workitem/47

Can typescript export a function?

I need to play **Google text-to-speech** in JavaScript. &lt;br&gt;
The idea is to use the web service: 

&gt; http://translate.google.com/translate_tts?tl=en&amp;q=This%20is%20just%20a%20test

And play it on a certian action, e.g. a button click.

But it seems that it is not like loading a normal wav/mp3 file:

    &lt;audio id=&quot;audiotag1&quot; src=&quot;audio/example.wav&quot; preload=&quot;auto&quot;&gt;&lt;/audio&gt;
    
    &lt;script type=&quot;text/javascript&quot;&gt;
    	function play() {
    		document.getElementById(&#39;audiotag1&#39;).play();
    	}
    &lt;/script&gt;

How can I do this?

Using Google Text-To-Speech in Javascript

I have come across several methods for handling click events in jquery:

bind:

    $(&#39;#mydiv&#39;).bind(&#39;click&#39;, function() {
        ...
    });

click:

    $(&#39;#mydiv&#39;).click(function() {
       ...
    }

on:

    $(&#39;mydiv&#39;).on(&#39;click&#39;, function() {
       ...
    }

Two questions:

1.   Are they any other ways of doing this?
2.   Which one should I use, and why ?

UPDATE:

As eveyone has helpfully suggested, I should have read the docs better, and found out that I should use:

on() or click(),

which are effectively the same thing.

However, nobody has explained why bind is no longer recommended ? I&#39;ll probably get more downvotes for missing the obvious somewhere, but I can&#39;t find a reason for this in the documents.

UPDATE2:

&#39;on&#39; has the useful effect of being able to add event handlers to dynamically created elements. e.g.

    $(&#39;body&#39;).on(&#39;click&#39;,&quot;.myclass&quot;,function() {
        alert(&quot;Clicked On MyClass element&quot;);
    });

This code adds a click handler to elements with a class of &#39;myClass&#39;. However, if more myClass elements are then dynamically added later, they automatically get the click handler as well, without having to explicitly call &#39;on&#39;. From what I understand people are saying, this is also more efficient (see Simons answer below).

jquery use of bind vs on click

If I have an expression `{{ x }}` and x is `undefined` or `null`, then how can I display a placeholder for it? 

I provided one solution in my answer, but I would like to know what other ways there are.
Maybe, also for placeholder for promises.

How to display placeholders in AngularJS for undefined expression values?

I have turned on the Chrome flag for experimental ECMAscript 6 features, one of which is `Set`. As I understand, the details of `Set` are broadly agreed upon by the spec writers.

I create a set `a` and add the string `&#39;Hello&#39;`

    a = Set();
    a.add(&#39;Hello&#39;);

but how do I iterate over the elements of `a`?

    for(let i of a) { console.log(i); }
gives &quot;SyntaxError: Illegal `let` declaration outside extended mode&quot;

    for(var i of a) { console.log(i); }
gives &quot;SyntaxError: Unexpected identifier&quot;

    for(var i in a) { console.log(i); }
gives `Undefined`


Is it possible to iterate over of a set in Chrome 26?

Iterate over set elements

ECMAScript 6&#39;s `let` is supposed to provide block scope without hoisting headaches. Can some explain why in the code below `i` in the function resolves to the last value from the loop (just like with `var`) instead of the value from the current iteration?

    &quot;use strict&quot;;
    var things = {};
    for (let i = 0; i &lt; 3; i++) {
        things[&quot;fun&quot; + i] = function() {
            console.log(i);
        };
    }

    things[&quot;fun0&quot;](); // prints 3
    things[&quot;fun1&quot;](); // prints 3
    things[&quot;fun2&quot;](); // prints 3

According to [MDN](https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Statements/let) using `let` in the `for` loop like that should bind the variable in the scope of the loop&#39;s body. Things work as I&#39;d expect them when I use a temporary variable inside the block. Why is that necessary?

    &quot;use strict&quot;;
    var things = {};
    for (let i = 0; i &lt; 3; i++) {
        let index = i;
        things[&quot;fun&quot; + i] = function() {
            console.log(index);
        };
    }

    things[&quot;fun0&quot;](); // prints 0
    things[&quot;fun1&quot;](); // prints 1
    things[&quot;fun2&quot;](); // prints 2

I tested the script with Traceur and `node --harmony`.

let keyword in the for loop

I played with generators in Nodejs v0.11.2 and I&#39;m wondering
how I can check that argument to my function is generator function.

I found this way `typeof f === &#39;function&#39; &amp;&amp; Object.getPrototypeOf(f) !== Object.getPrototypeOf(Function)` but I&#39;m not sure if this is good (and working in future) way.

What is your opinion about this issue?



check if function is a generator

[This recent video](http://youtu.be/tBkA6x0sbuQ?t=8m45s) claims that EMCAScript 6 destructuring is already partially implemented in Node.JS. I have tried various examples (using v0.10.12 and the `--harmony` flag), such as

    var [a, b] = [1, 2];

and 

    var {a: a, b: b} = {a: 1, b: 2};

to no avail. [This ticket](https://code.google.com/p/v8/issues/detail?id=811) seems to suggest that destructuring is not yet supported in V8.

Is destructuring really partially implemented in Node.JS? What are snippets of code I can play with?

Destructuring in Node.JS

I just discovered [this feature][1]:

&gt; Map: Map objects are simple key/value maps.

That confused me. Regular JavaScript objects are dictionaries, so how is a [`Map`][2] different from a dictionary? Conceptually, they&#39;re identical (according to [another question on Stack Overflow][3])

The documentation doesn&#39;t help either:

&gt; Map objects are collections of key/value pairs where both the keys and values may be arbitrary ECMAScript language values. A distinct key value may only occur in one key/value pair within the Map’s collection. Distinct key values as discriminated using the a comparision algorithm that is selected when the Map is created.

&gt; A Map object can iterate its elements in insertion order. Map object must be implemented using either hash tables or other mechanisms that, on average, provide access times that are sublinear on the number of elements in the collection. The data structures used in this Map objects specification is only intended to describe the required observable semantics of Map objects. It is not intended to be a viable implementation model.

…still sounds like an object to me, so clearly I&#39;ve missed something.

Why is JavaScript gaining a (well-supported) [`Map`][2] object? What does it do?

  [1]: https://www.chromestatus.com/features/4818609708728320
  [2]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
  [3]: https://stackoverflow.com/questions/2884068/what-is-the-difference-between-a-map-and-a-dictionary







Content Type	Original Author	Original Content on Stackoverflow
Question	contactmatt	View Question on Stackoverflow
Solution 1 - Javascript	Matt Ball	View Answer on Stackoverflow

When will ECMAScript v 6 become standard

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Connect to an URI in postgres

How to call the overridden method of a superclass?

Attributions