Can variable in javascript generate variables?

Question

Let's think about this:

var list = [a1:"123",b2:"234",c3:"345"];

This list obj can create variables by key name like this?

var a1 = list[0];   
var b2 = list[1];  
var c3 = list[2];

Answer 1

When you use [] notation, you can only create arrays with numeric indexes. To have named properties, you must use {} object notation:

var list = { a1: "123", b2: "234", c3: "345" };

You can then access them as list.a1, list.b2, and list.c3.

Answer 2

The question is not clear. What you show in the example is valid. But you could also create variable names like you suggest like

for( var key in list ) {
  window[key] = list[key];
} 

This way you will end up having a1, b2 and c3 variables with the desired value, however, these will be globals.

Answer 3

First of all you have a mistake, you are trying to merge hash array and regular array. You should either announce an array like this:

var list = ['123', '234', '345'] 

and then

var a1 = list[0] 

and so on, or announce it like hash array and it will look like this

var list = {'a':'123','b':'234','c':'345'}
var a1 = list.a