Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

Re: Re: Re: Re: Efficient processing of large directory

by BUU (Prior)
on Oct 02, 2003 at 17:51 UTC ( #295990=note: print w/ replies, xml ) Need Help??


in reply to Re: Re: Re: Efficient processing of large directory
in thread Efficient processing of large directory

Er, why on earth do you tell him to use while and then to use while to do the exact same thing the for loop had been doing previously? Your method is still going to need to build the 17,000 element list and iterate over it, it just uses a more explicit form. A rewrite which gets around this would be simply:

while(my $x = <*.*>) { do_stuff($x); }
This will only read a single file at a time and has no need to create huge lists.


Comment on Re: Re: Re: Re: Efficient processing of large directory
Download Code
Re5: Efficient processing of large directory
by dragonchild (Archbishop) on Oct 02, 2003 at 17:53 UTC
    Because I'm not answering the original question. I'm answering the question "What's the difference between for and while?". In that context (which was obvious from the followup question), does my post make sense?

    ------
    We are the carpenters and bricklayers of the Information Age.

    The idea is a little like C++ templates, except not quite so brain-meltingly complicated. -- TheDamian, Exegesis 6

    Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.

•Re: Re: Re: Re: Re: Efficient processing of large directory
by merlyn (Sage) on Oct 02, 2003 at 18:54 UTC

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://295990]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (15)
As of 2014-09-19 12:41 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (138 votes), past polls