在Javascript多维数组中设置数据

Question

I have created this multidimensional array in javascript.

var arr = [];
arr[0] = [];
arr[0][0] = [];
arr[0][0][0] = [];
arr[0][0][0][0] = []; 

and assigning values to the using this code

arr[0] = 1;
arr[0][0] = 2;
arr[0][0][0] = 3;
arr[0][0][0][0] = 4;
arr[0][0][0][0][0] = 5;
alert("arr ==> " + arr);

But it gives output as only 1 , but the desired output is 1,2,3,4,5

When I do this alert(arr[0][0]); the desired output is 2 but it gives undefined .

Thanks for helping.

Answer 1

You're overwriting your values:

arr[0] = [];
...
arr[0] = 1; // this also blows away arr[0][0], arr[0][0][0], etc

so...

arr[0][0] = 1;
==
1[0] = 1;

What exactly are you trying to do?

Answer 2

var arr = [];
arr[4] = [];

arr[0] = 1;
arr[1] = 2;
arr[2] = 3;
arr[3] = 4;
arr[4] = 5;

alert("arr ==> " + arr );

I hope this will solve your problem.

Alerts as

arr ==> 1,2,3,4,5