Javascript: How to insert a row at an index to a multidimensional array? - Stack Overflow

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I am novice programmer in javascript. Kindly guide me in the right path.

Below is a 3D array of size 2 x 3 x 3

"items": [ [ [1,2,3], [4,5,6], [7,8,9] ], [ [10,11,12], [13,14,15], [16,17,18] ] ]

Now, I need to insert a row, something like [ [19,20,21], [22,23,24], [25,26,27] ] at an index 1 or 2.

I tried with splice function, but all in vain.

Being a multi dimensional array, I don't know what value goes into the itemN parameter of the splice function.

items.splice(insertIndex, 0, `????`); 

How can I acplish it? Thanks

I am novice programmer in javascript. Kindly guide me in the right path.

Below is a 3D array of size 2 x 3 x 3

"items": [ [ [1,2,3], [4,5,6], [7,8,9] ], [ [10,11,12], [13,14,15], [16,17,18] ] ]

Now, I need to insert a row, something like [ [19,20,21], [22,23,24], [25,26,27] ] at an index 1 or 2.

I tried with splice function, but all in vain.

Being a multi dimensional array, I don't know what value goes into the itemN parameter of the splice function.

items.splice(insertIndex, 0, `????`); 

How can I acplish it? Thanks

• javascript
• arrays
• multidimensional-array

Share Improve this question Follow asked Oct 21, 2015 at 10:48 KarthikKarthik 1,07422 gold badges1616 silver badges3535 bronze badges

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3 Answers 3

Sorted by: Reset to default 7

use splice with deleteCount 0 (second parameter). as thrid param you enter the 2-dimensional array you want to add.

var items = [ [ [1,2,3], [4,5,6], [7,8,9] ], [ [10,11,12], [13,14,15], [16,17,18] ] ];
var add = [ [19,20,21], [22,23,24], [25,26,27] ];
items.splice(insertIndex, 0, add);

working example here: jsfiddle

You can pass plete array which you want to insert to splice parameter, like:

items.splice(2, 0,[ [19,20,21], [22,23,24], [25,26,27] ]);

DEMO

The accepted answer is good.

I make an demo to insert middle row in angular as reference.

I share for whom concerned.

    textarray = [
        [{ text: "Content 1" }, { text: "Content 2" }],
        [{ text: "Content 3" }, { text: "Content 4" }]
      ];
      rowindex = 1;
      insertmiddle() {
        let size = this.textarray[0].length;
        this.textarray.splice(this.rowindex, 0, 
             Array(size).fill({ text: "Content", tag: "Content" }));
      }

https://stackblitz./edit/angular-insert-row-matrix

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