Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Re: "Deep recursion" error

by sundialsvc4 (Abbot)
on Jun 28, 2013 at 16:28 UTC ( #1041285=note: print w/ replies, xml ) Need Help??

in reply to "Deep recursion" error

Even if you don’t choose to use a File::Find type module, you certainly can use their core techniques ... which don’t involve recursion.   Instead, they use a simple push-down stack.

You start by pushing the starting location on the stack.   Then, something like this:

while (the stack is not empty) { pop a name off the stack search that directory for entries: -- if it is "." or ".." then SKIP it. (Guess this is what you're +not doing.) -- if it is a directory, "push" or "unshift" the fully-qualified n +ame onto the stack. -- if it is a file, process it, or stack it on another queue it to + be processed soon. }

If you push the names, you get a “depth-first” search; if you unshift them, “breadth-first.”

This also circumvents another file-system bugaboo, especially noticeable in Windows:   the number of active “searches” that you can actually have going at one time, and the problem of interference between them.   Only one search is actually going-on at one time.

Comment on Re: "Deep recursion" error
Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1041285]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (8)
As of 2015-12-01 10:45 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (798 votes), past polls