my %data = (-hund => 12, -katze => 14, -maus => 16, -kuh => 18);
my @keys = keys %data;
my $size = @keys;
print "$size\n";
Why is the number of keys displayed when the variable $size
is output?
>Solution :
That’s because scalar assignment evaluates the right hand side in scalar context. An array returns the number of its elements in scalar context. See perldata.