dudes--

what if one and only one of my arrays has any data, and it's a single element? e.g. 

$self->{foo} = [];
$self->{bar} = [];
$self->{gotit} = [ 5 ];

[download]
the grep trick below will fail because $seen{5} will = 1. any ideas for dealing with this scenario with equal cleverness?

hi monks--

this might be a stupid way to do what i'm doing, but now i have to know. i have an object like this:

$self->{foo} = [ 1, 2, 3 ];
$self->{bar} = [ 4, 5, 3 ];
$self->{nerd} = [ 3, 4, 8 ];
$self->{geek} = 1;
$self->{useless} = 1;

[download]

now i want to find the array elements in all of the above that are the same. but i don't know which accessors have arrays and which don't. they only will have arrays if i put something there interesting, but i have no idea which ones will be used at any given time. so i do this, assuming i do know all possible accessor names: 

foreach(@accessors) {
    if( ref($self->{$_}) eq "ARRAY" ) {
        push @tocheck, $_;
    }
}

[download]
How do I now compare the contents of all the arrays i want to check? kind of like what would do this magic: 

foreach my $e ( all the self->{dontknow}->[]'s in @tocheck ) 
    { $isect{$e}++ }

[download]

Is there something smarter I can do other than push @tocheck? Is this the time for me to finally understand map? I've only used eval for the first time in my life today...

In reply to how do i find common elements of X number of arrays whose names i don't know? by basscakes

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