DigitalKitty has asked for the wisdom of the Perl Monks concerning the following question:
Hi all.
I wrote a simple test file (test.txt):
Which I then read via the following perl program:
Since I am currently reading the 1st edition of 'Intermediate Perl' aka 'Perl Objects, References, and Modules', I am trying to understand how to read/interpret the output provided by Data::Dumper. If wanted to display the score each monk received or just their last name, how would I accomplish that? I tried...
...but noticed the following complaints:
Any constructive advice would be most appreciated.
Thanks,
~Katie
Update: Solved the 'explicit package name issues' by declaring the lexical variables outside of the while loop.
I wrote a simple test file (test.txt):
Lateur Bart 97 Pierce Jerrad 96 Unknown planetscape 101 Miller Katie 86
Which I then read via the following perl program:
use warnings; use strict; use Data::Dumper; my %hash = (); my ($lname, $fname, $score); while( <> ) { ( $lname, $fname, $score ) = split; $hash{$lname}{$fname} = $score; } print Dumper(\%hash);
Since I am currently reading the 1st edition of 'Intermediate Perl' aka 'Perl Objects, References, and Modules', I am trying to understand how to read/interpret the output provided by Data::Dumper. If wanted to display the score each monk received or just their last name, how would I accomplish that? I tried...
print %{ $hash{$lname}{$fname}{$score} }\n";
...but noticed the following complaints:
C:\Perl\bin>perl test16.pl test.txt Global symbol "$lname" requires explicit package name at test16.pl lin +e 12. Global symbol "$fname" requires explicit package name at test16.pl lin +e 12. Global symbol "$score" requires explicit package name at test16.pl lin +e 12. Execution of test16.pl aborted due to compilation errors.
Any constructive advice would be most appreciated.
Thanks,
~Katie
Update: Solved the 'explicit package name issues' by declaring the lexical variables outside of the while loop.
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Replies are listed 'Best First'. | |
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Re: Deciphering the output from Data::Dumper
by FunkyMonk (Chancellor) on Dec 14, 2007 at 23:32 UTC | |
by ww (Archbishop) on Dec 15, 2007 at 12:36 UTC | |
Re: Deciphering the output from Data::Dumper
by Limbic~Region (Chancellor) on Dec 15, 2007 at 01:20 UTC | |
Re: Deciphering the output from Data::Dumper
by pascaldee (Acolyte) on Dec 16, 2007 at 02:44 UTC |
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