# $EPIC: rfilter.txt,v 1.2 2006/08/19 06:07:20 sthalik Exp $
======Synopsis:======
$__rfilter__(<word> <pattern list>)

======Technical:======
   * 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 DO NOT match <word>.
   * This is the complement to $[[rpattern]](), and the inverse of $[[filter]]().
   * Double quoted words are honored, but the double quotes will be lost in the return value.

======Practical:======
This function lets you "filter" <pattern list> through a word, keeping all
of the patterns that do not match a given word, and discarding all of the 
patterns that do 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 do, this function will do that.

======Returns:======
The list of patterns from <pattern list> that do not match <word>.

======History:======
This function first appeared in "plus-2" (post-ircII, pre-EPIC)

======Examples:======
<file>
$rfilter(foobar f* *oo* a* *c)    returns "a* *c"
$rfilter(hello hello a* *lo*)     returns "a*"
</file>