Oh yes, good catch :-)

(to the OP) - hash keys are always regarded as strings - that means you should make sure your numeric keys are represented as exactly the right string. I.e. $hash{1.0} is not the same as $hash{1}*. One way of doing that is to use sprintf. For example, if all your keys have 2 places behind the comma, you can use something like this: 

my $key = sprintf("%0.2f",$number);
my $value = $hash{$key}

[download]
Actually, it is. But $hash{"1.0"} is not the same as $hash{1.0} go figure. :-)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: Numeric as hash key returns undef... by Joost
in thread Numeric as hash key returns undef... by journey

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