Contributed by vroom
on Jan 12, 2000 at 00:35 UTC
Q&A
> Data Structures
Answer: How do I make a hash of arrays?
contributed by chromatic my %dramatis_personae = (
humans => [ 'hamnet', 'shakespeare', 'robyn', ],
faeries => [ 'oberon', 'titania', 'puck', ],
other => [ 'morpheus, lord of dreams' ],
);
Access it like this:
foreach my $group (keys %dramatis_personae) {
print "The members of $group are\n";
foreach (@{$dramatis_personae{$group}}) {
print "\t$_\n";
}
}
| Answer: How do I make a hash of arrays?
contributed by Anonymous Monk You can always...
push(@{$hash{$key}}, $insert_val);
...to load the arrays in the hash. That way you don't have to build the arrays, then dereference them into the hash. | Answer: How do I make a hash of arrays?
contributed by Anonymous Monk my @arrayOne = 1..10;
my @arrayTwo = 20..30;
my %HashOfArrays = ( one => \@arrayOne );
$HashOfArrays{two} = \@arrayTwo;
$HashOfArrays{IpointToTheSameArrayAsOne} = \@arrayOne ;
$HashOfArrays{IreferenceTheSameArrayAsOne} = \@arrayOne ;
$HashOfArrays{MyValueIsThatOfOneAsWell} = \@arrayOne ;
## to create an array reference, just type \@array
## or [ @array ]
## [ @array ] does not equal \@array
## see perlref for more info
| Answer: How do I make a hash of arrays?
contributed by Doraemon my $array = []; #create new anonymous array ref
push (@$array, '11');
push (@$array, '12');
push (@$array, '13');
$hash{'first'} = $array; # add
$array = []; #create a new anon-array
push (@$array, '21');
push (@$array, '22');
push (@$array, '23');
$hash{'second'} = $array; # add
print "Hash content\n";
foreach $k (keys %hash) {
foreach (@{$hash{$k}}) {
print " : $_";
}
print "\n";
}
|
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