Perl doesn't have multi-dimensional arrays; it has arrays of references to arrays, so doing something like 

print join("\n",@AoA);      #where @AoA is an Array of Arrays

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will print a list of array references.

To manipulate individual elements, the sub-array has to be dereferenced, sort of like this:

my @AoA;

my @subarray;

@subarray = @{$AoA[$i]};

tr/A-Z/a-z/ foreach @subarray;

$AoA[$i] = \@subarray;

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Note that the above is not intended to be valid Perl code, that's why I said "sort of like this." Check perlref for an explanation guaranteed to be correct. And I think it's clear, too.

Information about American English usage here and here. Floating point issues? Please read this before posting. — emc

In reply to Re: Array of array building by swampyankee
in thread Array of array building by JimEL

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