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

Re: Re: opening a file destroys nulling entries in a list?!?!

by bobn (Chaplain)
on Aug 07, 2003 at 03:38 UTC ( #281728=note: print w/ replies, xml ) Need Help??


in reply to Re: opening a file destroys nulling entries in a list?!?!
in thread opening a file destroys nulling entries in a list?!?!

How come while(<IN>){}, but not for (@x) {}? why is while (<IN>) so special?

I love perl, but this scares the hell out of me.

--Bob Niederman, http://bob-n.com


Comment on Re: Re: opening a file destroys nulling entries in a list?!?!
Select or Download Code
Re: Re: Re: opening a file destroys nulling entries in a list?!?!
by bobn (Chaplain) on Aug 07, 2003 at 03:45 UTC

    Nevermend. I think I get it - someone else posted that while(<>){} is the same as while($_=<>){} - it does an assignment to $_ and that's what does the damage.

    Somehwere, I think I remember someone (Tom Christiansen, I think) saying to always localize $_ in subroutines. Now I know why.

    --Bob Niederman, http://bob-n.com

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://281728]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (4)
As of 2015-07-05 08:25 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (61 votes), past polls