About the definition of javascript variable [duplicate]

Question

Possible Duplicate:
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?

var all = [];
var all = new Array();

What is the difference between these two definitions? I can't make them clear.

Ilia Frenkel · Accepted Answer · 2012-03-30 23:43:34Z

0

There is no difference. But best practice is to avoid using new on JavaScript primitive types.

answered Mar 30, 2012 at 23:43

Ilia Frenkel

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2 Comments

There is a difference, please read the linked question.

For example: var all =[]; var all1= new Array(); the all1[2] may have undefined type, but variable all is always blank string, is it?