$rpattern(<word> <pattern list>)

• If the <word> argument is omitted the empty string is returned.
• This function returns a space separated pattern list of all of the patterns in <pattern list> that match <word>.
• This is the complement to $rfilter(), and the inverse of $pattern().
• Double quoted words are honored, but the double quotes will be lost in the return value.

This function lets you “filter” <pattern list> through a word, keeping all of the patterns that match a given word, and discarding all of the patterns that do not match the given word. If you have a list of patterns, some of which match a word (say, a nick!user@host string) and some of which don't, and you want to remove the ones that don't, this function will do that.

The list of patterns from <pattern list> that match <word>.

This function first appeared in “plus-2” (post-ircII, pre-EPIC)

$rpattern(foobar f* *oo* a* *c)     returns "f* *oo*"
$rpattern(hello hello a* *lo*)      returns "hello *lo*"