Re^2: Removing duplicate values for a hash of arrays

my %hash = (
   a => [ '1','2', ],
   b => [ '2','3', ],
   c => [ '1','2', ],
);
say "$_ => $hash{$_}" for keys %hash;
[download]

c => ARRAY(0x1abd8f0)
a => ARRAY(0x1a9f998)
b => ARRAY(0x1abd7a0)
[download]

So the two arrays are two different arrays, and you can't compare them with a simple cmp.

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Re^3: Removing duplicate values for a hash of arrays by Laurent_R (Canon) on Nov 21, 2013 at 18:55 UTC
Yes, if the hash is built this way, these will be different array refs, but we don't know how the hash was originally constructed. This is why I asked the question.	[reply]