is this an array or a hash or what ?

[iza]

hi

this is a hash :
%hash1=("key1"=>"value1","key2"=>"value2"

this is an array :
@a=(1,2,3);

but what is THIS ???
????=["key1"=>"value1","key2"=>"value2"]; ????
and how can i build it, if i have key1, value1, key2 and value2 ???

thanx for any answer )

 

[toolkit]

iza

Named hashes and arrays are defined like:

%hash = ( key1 => 'value1', key2 => 'value2' );
@array = ( 1, 2, 3 );

Anonymous hashes and arrays are defined like:

{ key1 => 'value1', key2 => 'value2' };
[ 1, 2, 3 ];

Anonymous structures are used to create more powerful nested data structures, for example:

my %data = ( valid   => [ "good", "ok", "yes" ],
             meaning => { ASAP => "As soon as possible",
                          RSVP => "Respondez s'il vous plait",
                        },
           );

In this example,

$data{'valid'}

points to an anonymous array, and

$data{'meaning'}

points to an anonymous hash. You would access this information like:

foreach ( @{ $data{ 'valid' } } ) {
    print "valid string: $_\n";
}

foreach ( sort keys %{ $data{ 'meaning' } } ) {
    print "$_ means $data{ 'meaning' }->{$_}\n";
}

For your example, you will need change the []'s to {}'s, to change from anonymous array to anonymous hash.

Hope this helps, s-) NEIL

 

[iza]

thank you neil )
but i had to use a function that requires a structure like this [value => key, another_value => another_key] - and i wondered what kind of a ?hash? ?array? it could be .... still don't know, but i managed to pass a string and then eval it, and it works fine
thanks anyway ))

 

[raider2001]

To learn more about data structures in Perl, check out "perldoc perldsc".