June 2002
Beginner
759 pages
80h 42m
English
filter
filter()
Performs the main processing for the filter. Used with
closure filters; that is, a closure filter handles the lexical
variables that are maintained by the closure. The finished source,
as processed by filter, will be
returned in $_.
filter returns a status,
as follows:
< 0An error has been encountered.
EOFEnd-of-file has been reached unexpectedly.
> 0Everything is OK.