无法推送到Array内部的Array

Question

var tags = new Array();
var tags[4]= new Array();
tags[4].push("Hello");

Somehow this doesnt work, console Says on line two that there's an unexpected Token... Can you help me somehow? Its an Array inside an Array. I simplified the code, because the rest is right.

Thx

Answer 1

var tags[4] is incorrect. Just tags[4] is needed.

Answer 2

It's a simple mistake to make. Just remove var from line 2...

var tags = new Array();
tags[4]= new Array();
tags[4].push("Hello");

tags[4] is already available by declaring tags on line 1.

Answer 3

Remove the var before tags[4] . tags is the variable, tags[4] is a property of the object referenced by that variable, not another variable.

var tags = new Array();
tags[4]= new Array();
tags[4].push("Hello");

Answer 4

var tags[4] // is incorrect.
// use this
tags[4]= new Array();
tags[4].push("Hello");

var keyword creates a variable so old value is lost .

Answer 5

The array tags has already been initialized, so you don't need var on the second line. Remove it and the code works as expected.

Answer 6

Remove var before tag[4]

Try this instead.

var tags = new Array();
tags[4]= new Array();
tags[4].push("Hello");