Site Tools


filter

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

filter [2006/08/01 03:13]
filter [2006/08/01 03:13] (current)
Line 1: Line 1:
 +# $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>
  
filter.txt ยท Last modified: 2006/08/01 03:13 (external edit)