timjpriebe — Tue, 07 Feb 2006 16:44:31 +0000

If you can, post the code you're working with. That would help us help you better.

MyFreeCounter — Tue, 07 Feb 2006 02:57:51 +0000

to check if an element is in the array already, check it using in_array first, only insert if it returns false (http://us2.php.net/in_array). Also, if you want to get rid of duplicate entries, you can run array_unique to return only one of each element in the array. (http://us2.php.net/array_unique)

Abhishek Reddy — Sat, 28 Jan 2006 03:53:55 +0000

Map is used to run parameters through a given expression (could be a function, for example). You could probably write a solution to test for duplicates yourself using map, but that would be reinventing the wheel.

I gather you are trying to make what's called a 'set', which is a list containing no duplicate entries. You can use Ron Savage's Set::Array module to do things with your arrays to make sets or identify duplicates or whatever you need specifically.