Re: [PERL] For meget i en variabel....??? eller hvad ?

[Lennart Hansen <sslug@sslug>]

Tak for alt din hjælp....


Lars Clausen wrote:
> 
> On Tue, 02 Nov 1999, sslug@sslug wrote:
> 
> > Lars Clausen wrote:
> >>
> >> >> 2) brug "use strict". Den vil tvinge dig til at deklarere alle de
> >> >>    variabler
> >> > Og hvordan er det lige jeg gør det ???
> >>
> >> use strict;
> >>
> >
> > Øhh...hmmm jeg tror du har ledt mig helt på vildspor... jeg får en masse
> > fejl lige som denne:
> >
> > "Global symbol "$ny_domain" requires explicit package name at ./file.pl
> > line 80"
> 
> Når du bruger strict, skal du erklære alle variabler, f.eks. med my ($foo,
> $bar...).
> 
> > kan du ikke pege på et link eller fortælle hvordan jeg kan erklare de
> > variabler ???
> > Og det er EFTER jeg har skrevet "use strict;" i toppen af programmet.
> 
> Først, fra Perl FAQ:
> 
> How do I debug my Perl programs?
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Have you used -w? It enables warnings for dubious practices.
> 
> Have you tried use strict? It prevents you from using symbolic references,
> makes you predeclare any subroutines that you call as bare words, and
> (probably most importantly) forces you to predeclare your variables with my
> or use vars.
> 
> Did you check the returns of each and every system call? The operating
> system (and thus Perl) tells you whether they worked or not, and if not
> why.
> 
>   open(FH, "> /etc/cantwrite")
>     or die "Couldn't write to /etc/cantwrite: $!\n";
> 
> Did you read the perltrap manpage? It's full of gotchas for old and new
> Perl programmers, and even has sections for those of you who are upgrading
> from languages like awk and C.
> 
> Have you tried the Perl debugger, described in the perldebug manpage? You
> can step through your program and see what it's doing and thus work out why
> what it's doing isn't what it should be doing.
> 
> Mere forklaring på
> <URL:http://www.netcat.co.uk/rob/perl/win32perltut.html#163-BondageandDiscipline>.
> 
> -Lars
> 
> --
> Lars R. Clausen (http://shasta.cs.uiuc.edu/~lrclause)   Hårdgrim of Westfield
> "I do not agree with a word that you say, but I will defend to the death your
> right to say it."                                             -- Voltaire (?)

-- 

	MVH
		Lennart Hansen