Array initialization problem

I have the following code:

var intrebari = new Array();
var i = 0;
intrebar开发者_运维百科i[i]['enunt'] = 'test';
alert(intrebari[i]['enunt']);

The problem is that when I run it it says that intrebari is undefined. Why?

Yes interbari[0] is null , so it cannot be object - and for adding into array use push instead of indexes

var intrebari = [];
intrebari.push({ 'enunt': 'test' });
alert(intrebari[i]['enunt']);

This will work

var intrebari = new Array();
var i = 0;
intrebari[i] = new Object()
intrebari[i]['enunt'] = 'test';
alert(intrebari[i]['enunt']);

You need to assign something to intrebari[i] before you can access any properties of it, "by default" its value is undefined that doesn't have any properties. For example:

intrebari[i] = new Object();
intrebari[i]["enunt"] = "test";
alert(intrebari[i]["enunt"]);