# $EPIC: filter.txt,v 1.2 2006/08/01 02:45:08 sthalik Exp $
======Synopsis:======
$__filter__(<pattern> <word list>)

======Technical:======
   * If the <pattern> argument is omitted the empty string is returned.
   * This function returns a space separated word list of all of the words in <word list> that are NOT matched by <pattern>.
   * This is the complement to $[[pattern]](), and the inverse of $[[rfilter]]().
   * Double quoted words are honored, but the double quotes will be lost in the return value.

======Practical:======
This function lets you "filter" <word list> through a pattern, removing
all of the words that match the pattern and keeping all of the words that
do not match the pattern.  By appending * to a string and using this
function, you can quickly find all words in a word list that do not start 
with a particular substring.

======Returns:======
The list of words from <word list> after all words matched by <pattern>
have been removed.

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

======Examples:======
<file>
$filter(*oo* foobar blah booya)   returns "blah"
$filter(*a* hello there bob)      returns "hello there bob"
$filter(irc* $myservers())        returns all servers you are 
                                  connected to that don't start
                                  with the string "irc".
</file>