Read datastructure

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hello

What is this data structure I get with Dumper?

$VAR1 = [
          {
            'sourceL' => 'spacecraft',
            'source' => 'MT',
            'targetL' => 'vaisseau spatial'
          }
        ];
[download]

Why can I not read it with the following?

    foreach (@data){
        print my $target= ucfirst($_->{targetL});
    }
[download]

Comment on Read datastructure Select or Download Code

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Re: Read datastructure by hippo (Archbishop) on Feb 05, 2021 at 23:46 UTC
It's a reference to an array of hash refs, so you must de-reference it first. `#!/usr/bin/perl use strict; use warnings; my $VAR1 = [ { 'sourceL' => 'spacecraft', 'source' => 'MT', 'targetL' => 'vaisseau spatial' } ]; for (@$VAR1) { print ucfirst $_->{targetL} ; }` [download] See perldsc for lots more. 🦛	[reply] [d/l]
Re^2: Read datastructure by Anonymous Monk on Feb 05, 2021 at 23:49 UTC
thank you	[reply]
Re: Read datastructure by AnomalousMonk (Archbishop) on Feb 05, 2021 at 23:52 UTC
Alternatively: `Win8 Strawberry 5.8.9.5 (32) Fri 02/05/2021 18:49:03 C:\@Work\Perl\monks >perl -Mstrict -Mwarnings -MData::Dumper my @data = ( { 'sourceL' => 'spacecraft', 'source' => 'MT', 'targetL' => 'vaisseau spatial' } ); print Dumper \@data; foreach (@data){ print my $target= ucfirst($_->{targetL}); } ^Z $VAR1 = [ { 'source' => 'MT', 'sourceL' => 'spacecraft', 'targetL' => 'vaisseau spatial' } ]; Vaisseau spatial` [download] How and from what are you producing the `Dumper` output (which is what the output looks like)? Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re: Read datastructure by Fletch (Bishop) on Feb 06, 2021 at 03:23 UTC
For more information see the data structures cookbook: perldsc The cake is a lie. The cake is a lie. The cake is a lie.	[reply]