filter, rfilter

Synopsis:
$filter(<pattern> <word list>)
$rfilter(<word list> <pattern>)

Technical:
These function are used to filter out any items from the input list that do not match the given word (for $rfilter( )) or pattern (for $filter( )). If there are no matches, the entire input list is returned.

Practical:
These functions are effectively the opposite of the $pattern( ) and $rpattern( ) functions. The pattern functions return items that do match, while the filter functions return those that don't.

Returns:
items in input list that do not match given word/pattern

Examples:
$filter(*oo* booya blah foobar) returns "blah"
$filter(*oo* blah erf twiddle) returns "blah erf twiddle"
$rfilter(blah b* *oo* *bar) returns "*oo* *bar"
$rfilter(blah foo* *ya *bar) returns "foo* *ya *bar"

See Also:
pattern
rpattern

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