HeffaK has asked for the wisdom of the Perl Monks concerning the following question:

Hi all! I have a hash question for you.
Is it possible to add to the value of a hash...

Explaination:
$hash{$timestring}++;
If 15:00:00 was put in the hash twice the value for that key would be 2.

Now, is it possible to instead make something like this
$hash{$timestring}+$value;
so if the value 100 was associated with 15:00:00 the value would become 200 the next time 15:00:00 was put into the hash.
Any ideas on how to accomplish this.
Thanks!.
Heffa K.

Replies are listed 'Best First'.
Re: Tricky hash value
by bent (Scribe) on Apr 20, 2001 at 04:06 UTC
    Hi,
    How about: 
    $hash{$timestring} += $value;

    [download]
    bent
[reply]
[d/l]
Re: Tricky hash value
by cLive ;-) (Prior) on Apr 20, 2001 at 04:17 UTC
    what about this: 
    # sample related values
my %val  = ('14:00:00' => '200',
            '15:00:00' => '100',
            '16:00:00' => '300');

my @time = ('15:00:00','14:00:00','15:00:00','16:00:00');

my %hash;

for (@time) {
  $hash{$_} += $val{$_};
}

    [download]

    Or am I misunderstanding the question?

    cLive ;-)

[reply]
[d/l]
Re: Tricky hash value
by Anonymous Monk on Apr 20, 2001 at 04:16 UTC 
    Thanks! That was exactly what I was looking for.
Thanks again.
HeffaK
[reply]

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