Associative array/Creation: Difference between revisions

==[[Perl]]==

[[Category:Perl]]

'''Interpeter:''' Perl

===Defining a Hash===

# using => key does not need to be quoted unless it contains special chars

my %hash = (

key1 => 'val1',

'key-2' => 2,

three => -238.83,

4 => 'val3',

);

# using , both key and value need to be quoted if containing something non-numeric in nature

my %hash = (

'key1', 'val1',

'key-2', 2,

'three', -238.83,

4, 'val3',

);

===Defining a HashRef===

my $hashref = {

key1 => 'val1',

'key-2' => 2,

three => -238.83,

4 => 'val3',

}

===Using a Hash===

print $hash{'key1'};

$hash{'key1'} = 'val1';

@hash{'key1', 'three'} = ('val1', -238.83);

===Using a HashRef===

print $hash->{'key1'};

$hash->{'key1'} = 'val1';

@hash->{'key1', 'three'} = ('val1', -238.83);