scope – Understanding the "|| {}" construct in javascript

Possible Duplicate:

What does “var FOO = FOO || {}” mean in Javascript?

Javascript – Can you add condition to variable declaration

I believe this has to do with scoping, and not redefining scope. I see a lot of this in popular javascript frameworks:

var something = something || {};

Is that to do with not accidentally redefining a top-level variable?

Rating: 1 out of 5 based on 8 ratings

Posts Related to scope - Understanding the "|| {}" construct in javascript

• Aug 25th, 2012 html5 - Understanding <input type="file"> Saturday AM 02:41:00


• Jul 19th, 2012 backbone.js - Javascript variable declaration : what is "var myVariable = {}"? Thursday AM 00:16:11


• Jul 30th, 2012 How to manipulate the "onclick" event of a html button element with JavaScript? Monday AM 02:25:57


• Aug 11th, 2012 javascript - Prototyping "arguments" Saturday AM 11:04:49


• Aug 12th, 2012 javascript - Prototyping "arguments" Sunday AM 00:42:39


• Jul 10th, 2012 Is there a PHP equivalent of "new Array (number)" in javascript? Tuesday PM 15:42:51


• Aug 17th, 2012 php - Add ' \\ ' before " ' " of a string variable in javascript Friday AM 00:30:30


• Jul 22nd, 2012 What does the Object function do in Javascript when used with the "new" keyword? Sunday PM 13:36:30


• Jul 11th, 2012 javascript - Comparing "this" object with Object in DOM Array Wednesday AM 06:39:22


• Aug 19th, 2012 Javascript dynamic link issues? Sunday AM 04:09:48

The post scope – Understanding the "|| {}" construct in javascript appeared first on Javascript ASK.

via Javascript ASK http://javascriptask.phpfogapp.com/scope-understanding-the-construct-in-javascript.html