Question

I am looking for a JavaScript array insert method, in the style of:

arr.insert(index, item) 

Preferably in jQuery, but any JavaScript implementation will do at this point.

Answer 1

You want the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it’s just an insert).

In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = 'Jani'; arr[1] = 'Hege'; arr[2] = 'Stale'; arr[3] = 'Kai Jim'; arr[4] = 'Borge';  console.log(arr.join()); // Jani,Hege,Stale,Kai Jim,Borge arr.splice(2, 0, 'Lene'); console.log(arr.join()); // Jani,Hege,Lene,Stale,Kai Jim,Borge