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beforew

# $EPIC: beforew.txt,v 1.4 2007/03/02 02:32:04 jnelson Exp $

Synopsis:

$beforew(<word> <pattern list>)

Technical:

  • If the <word> argument is omitted this function returns the empty string.
  • The <pattern list> does not actually need to be a list of wildcard patterns. A list of literal words will work just fine.
  • If <word> is not matched by any of the words in <pattern list>, this function returns the empty string.
  • Otherwise, the function behaves “as if” the following had been performed: <val> = rmatch(<word> <word/pattern list>) <function_return> = leftw(<val> <word/pattern list>)
  • Remember that <pattern list> is a list of words.

Practical:

This function lets you get the part of <pattern list> that occurs BEFORE the pattern that is the “best match” for <word>. You can of course use this function with a list of literal words.

Returns:

The portion of <pattern list> before the pattern that is the “best match” of <word>. A word is always “best matched” by itself; see the help file on pattern matching for more detail.

Examples:

$beforew(foobar one two foobar my shoe)    returns "one two"
$beforew(booya one two foobar my shoe)     returns ""  (empty string)
$beforew(foobar o* t* f* m* s*)            returns "o* t*"
$beforew(booya o* t* f* m* s*)             returns ""  (empty string)
$beforew(foobar f* fo* foobar foo* foob*)  returns "f* fo*"

History:

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

beforew.txt · Last modified: 2007/03/02 02:32 (external edit)