Function WishList

I am looking for ideas for functions that you would like in SAS but currently do not exist. I have a couple of ideas such as:

Count the number of words in a string (or items in a list).

How about a function to quote the words in a character string?

A function to determine if a number is prime or not?

Would you like a function that returns an MD5 hash from its input?

And I looked through a couple of the SASWARE ballots and found some contenders.
Such as, provide a function that returns the ordinal of a word in a string, such as
WORDINDEX("abc de def", "def")=3

Do you have any other ideas? If so, please let me know.