jQuery - insert item into array at a specific index

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 because I can't believe the trouble I'm having finding such a basic function! Thanks for your help.

Answer 1

What you want is the splice function on the native array object. Quoted from the referenced link:

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

<script type="text/javascript">
   var arr = new Array(5);
   arr[0] = "Jani";
   arr[1] = "Hege";
   arr[2] = "Stale";
   arr[3] = "Kai Jim";
   arr[4] = "Borge";

   document.write(arr + "<br />");
   arr.splice(2,0,"Lene");
   document.write(arr + "<br />");
</script>

The output of the code above will be:

Jani,Hege,Stale,Kai Jim,Borge
Jani,Hege,Lene,Stale,Kai Jim,Borge