This would be a simple identifier that would be rather easy to include. I have found it annoying to get just the nickname (nick) from a full address (nick!ident@host.com), due to the fact that I cannot use the $nick identifier. Why? It is being read from a hash table, and is not in responce to anything.
Here's what I've been doing for the time being:
$left(<address>, $calc( $len(<address>) - $len( $mask(<address>, 0)) +1 ))
Basically, if the <address> is...
nick!ident@host.com
The function would return...
nick
This should be relatively easy to add, and I'm sure more people than just myself would find use of it.
NOTE: I did read through the "Nick and address identifiers" section of the mIRC help file, and I didn't find an identifier that does this. If I perhaps missed it, and it's already included, post it here so I know that it was already included!