I'm having trouble understanding exactly what you want, and it's possible that others are too.

In reading your other post, I see that there was some confusion about your requirements there as well.

A recommendation -- rewrite your question to show:

1. What it is you have for input data (looks like you have this already)
2. What you're trying to achieve (you partially have this, but it's hard to understand how replacing an item in an array has anything to do with the second array)
3. What it is you're expecting for output (ie. results)
4. If at all possible, please provide some code.  Then you can say "this code isn't working; I expect ... but instead I'm getting ..."

Another piece of advice -- when you reference another node (eg. http://perlmonks.org/?node_id=609784), simply put brackets ([ ... ]) around the node's id like this:  [id://609784].  This will cause it to appear as a link:  Array searching.

Or you can use the notation [id://609784|other post] (as I did above), which will appear as:  other post.