Can Array Name have Variable?

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Join Date: Mar 2008

Posts: 17

Reputation: godevars is an unknown quantity at this point

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Solved Threads: 0

godevars

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Can Array Name have Variable?

Apr 16th, 2008

Here's one I haven't been able to find an answer to. I have 4 arrays:
@array1, @array2, @array3, @array4. I ran code to compare the values of 2 arrays to see number of values in common:

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use strict;
use warnings;

my (%union, %intersect);
foreach my $e (@array1, @array2) {
    $union{$e}++ && $intersect{$e}++
}
my @intersect = sort keys %intersect;

print FILEOUT "@intersect\n";
print FILEOUT scalar @intersect;

I was thinking, if I wanted to compare all pairs of arrays and values they had in common, I could create a loop that started with @array1 and compared it to each array. In th loop I would make the digit in the array name a variable. For example:

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use strict;
use warnings;

my (%union, %intersect, $i);

while ($i <6) {
    foreach my $e (@array1, @array$i) {
         $union{$e}++ && $intersect{$e}++
     }
     my @intersect = sort keys %intersect;
     print FILEOUT "@intersect\n";
     print FILEOUT scalar @intersect;
     $i++;
}

As you probably know already, the @array$i variable doesn't work.

In the end I'm looking to have a grid where I see belwo but was starting witht he basics:

array1 array2 array3 array4
array1 10 5 17 2
array2 5 15 8 1
array3 17 8 14 6
array4 2 1 6 19

I could create an outer loop that would have tha array names each witha variable in the foreach loop.
Thanks-