tie hash i wantarray dla FETCH

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Article #52575

#52575

From: Piecia aka dracorp
Date: Wed, 25 Feb 2015 07:32

32 lines
1841 bytes

Witam
Mam związany hash z klasą za pomocą tie. Wartości dla tego hasha to tablica dwuelementowa. Pytanie dlaczego dla wantarray* nigdy nie zwraca true dla postaci:
#v+
my @array = $hash{klucz};
#v-
Jedyny sposób żeby pobrać tablicę to:
#v+
tied(\%hash)->FETCH('klucz');
#v-

Na początku myślałem że to wina starego Perla, 5.8.8 ale na nowym jest to samo.

*)
#v+
sub FETCH {
  my ( $self, $key ) = @_;

  if ( exists $self->{$key} ){
      if ( wantarray ){
          return @{$self->{$key}};
      }
      else {
          return $self->{$key}->[VALUE];
      }
  }
  return;
}
#v-

-- 
Pozdrawiam Piotr
piecia aka dracorp

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Subject: tie hash i wantarray dla FETCH
From: Piecia aka dracorp <piotr.rogoza@wp.eu>
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