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Full Discussion: I can't stop the scoping problem (perl)
Top Forums Shell Programming and Scripting I can't stop the scoping problem (perl) Post 302371616 by thmnetwork on Sunday 15th of November 2009 11:10:03 PM
Old 11-16-2009
I can't stop the scoping problem (perl)
I hate to post something so n00bish, but I'm pretty n00bish when it comes to perl so here it goes:

Code:
$var=1;

while(1){ 

   if ($var == 2){
      last;
   }

   $var=2;
}

works the way I intend it to, breaking the infinite loop after the first time through, but:

Code:
while(1){

   $var=1;

   if ($var == 2){
      last;
   }

   $var=2;

}

results in what I can only assume is an infinite loop. My question is what changes scope-wise to the if statement when $var is instantiated outside of the while loop?

update:
Title is supposed to be "spot" not "stop" but apparently I'm dyslexic.
Last edited by thmnetwork; 11-16-2009 at 12:15 AM..
 

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LEARN ABOUT NETBSD

update-rcconf-guide

UPDATE-RCCONF-GUIDE(8)						 Debian GNU/Linux					    UPDATE-RCCONF-GUIDE(8)

NAME

       update-rcconf-guide - Create default guide file for rcconf

SYNOPSIS

       update-rcconf-guide

DESCRIPTION

       Update-rcconf-guide creates the default guide file which rcconf uses.

       Update-rcconf-guide searches the package names corresponding to each service file in /etc/init.d directory from dpkg info
       files(/var/lib/dpkg/info/*.list) and get the description of these packages using apt-cache. Update-rcconf-guide uses Short-Description in
       priority to the description if service files has Short-Description field.  Update-rcconf-guide writes those results to
       /var/lib/rcconf/guide.default file.

       You can write your own guide in user guide file(/var/lib/rcconf/guide) by hand.	Rcconf refers Guides in /var/lib/rcconf/guide before those
       in /var/lib/rcconf/guide.default.

       If you install some packages after executed update-rcconf-guide, you need to re-create this file using update-rcconf-guide so as to refresh
       guide.default that includes new guides for installed new services.

       Notice: update-rcconf-guide was not executed when you installed rcconf
	       package.

FILE

       /var/lib/rcconf/guide.default
	       Guide File update-rcconf-guide generates.

       /var/lib/rcconf/guide
	       Guide File user(Administrator) can define.

SEE ALSO

       rcconf(8)

AUTHOR

       Atsushi KAMOSHIDA <kamop@debian.org>

perl v5.10.1							    2009-01-21						    UPDATE-RCCONF-GUIDE(8)
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