How can I find the union/difference/intersection of two arrays? is a good place to look.
Categorized Questions and Answers is your friend.
--In reply to Re: Code requested for array intersection count
by edan
in thread Code requested for array intersection count
by harry34
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |