How to count the total array elements [[]] using javascript

Question

My array with element,

var count =[["test1.img","test2.img","test3.img"]];

If I count array element [] single dimensional, The count is working fine But If I use like this [[]], It's not working.

MY Question

How to count the total array elements in a two-dimensional array.

The output should be 3.

Thanks

`count[0].length` or you want something more?show complex question and more expected output? — xianshenglu, Apr 11 '18 at 06:20
Possible duplicate of [Why am I getting an error with this 2d array?](https://stackoverflow.com/questions/40656681/why-am-i-getting-an-error-with-this-2d-array) — Nikola Lukic, Apr 11 '18 at 06:25
@NinaScholz I want to count the total array elements in given line. — Ashok Charu, Apr 11 '18 at 07:15

score 1 · Accepted Answer · edited Apr 11 '18 at 07:48

1

You want the count of the inner array.

The number of elements in an array the simple way is to use Array.length.
In your case, you would use count[0].length.

    var count =[["test1.img","test2.img","test3.img"]];
    var result = count[0].length;
    console.log(result);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js"></script>

edited Apr 11 '18 at 07:48

Ashok Charu

274
2
23

answered Apr 11 '18 at 06:22

Mustafa

56
1
2

score 1 · Answer 2 · answered Apr 11 '18 at 06:24

Assuming you have a array of arrays and you want to sum up the length of all the array items. You can try following using Array.reduce

// Code goes here

var arr = [["test1.img","test2.img","test3.img"]];

var count = arr.reduce(function(a, subArray){
  return a + subArray.length;
}, 0);

console.log(count);

How to count the total array elements [[]] using javascript

2 Answers2