John W. Krahn wrote:
>
> Stephen wrote:
>
> > 4. Maybe I'm restating the above question, but in addition to the
> > &wanted sub, File::find accommodates process, etc., as well. When/how
> > can these are typically used?
>
> Sorry, I've never used them.
You can specify 'preprocess' and 'postprocess' routines with the alternate
form of the call to 'find', with an anonymous hash as the first parameter
instead of a code reference. Like this:
find( {
wanted => \&wanted,
preprocess = \&preprocess,
postprocess = \&postprocess,
}, 'C:/SomeFolder');
In essence, what File::Find does is
- Read a file directory
- If 'postprocess' is specified then the subroutine is called with
the list of files as parameters. The subroutine must then return
a list of those files it is interested in.
- The 'wanted' subroutine is called for each member of the list
with the file name as a parameter.
- If the 'postprocess' subroutine is specified then it is called
with no parameters.
- If any of the files in the list were directories then this process
process recurses for each of them.
There's a little more to it than that but that's the basics.
HTH,
Rob
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