Re: How to add array in Hash

Hi Bennierounder, welcome to PerlMonks.
Please, use code tags <c> and </c> around your code (see Markup in the Monastery).
As it seems, you want to add an array into a value of a hash, not into its key. This can be achieved by creating Hash of Arrays (see perldsc).

Comment on Re: How to add array in Hash

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Re^2: How to add array in Hash by bennierounder (Sexton) on Sep 01, 2011 at 13:42 UTC
Thank you for your reply. I had an array inside a hash and the values from the array needed totaling up to one figure and not 20 + values. Just wanted the total of the values instead of them all individually. I did as follows. The keys in the %interest_hash were dates and the value was an array. I need to link the key to all the elements of the array added together so I just had one figure for the total. foreach my $interest_costs (keys %interest_hash) { my $total = 0; ($total += $_) for @{$interest_hash{$interest_costs}}; $new_interest_hash{$interest_costs} = $total; } This code got me the result I needed, however I was told to use map, but have no idea what it is. I got the desired outcome anyway, but thankyou very much for your reply. It is much appreciated. Only been doing Perl 4 months as a trainee developer and have no other experience computer languages so I think I'll be using perl monks quite often. Thanks again!	[reply]
Re^3: How to add array in Hash by toolic (Bishop) on Sep 01, 2011 at 13:58 UTC
I was told to use map, but have no idea what it is. map is a built-in Perl function. It's documentation can be found online and at your command prompt: `perldoc -f map` [download] I think I'll be using perl monks quite often Great, but please read Writeup Formatting Tips	[reply] [d/l]