I'm trying to organize some data into one structure for reporting. I collate the data from parsing emails.

I have multiple sites, siteA, siteB etc and for each site there are dates and some dates repeated (the number of times I want to report).

I decided to create a hash of sites and the hash value for each site to be a hash of dates and the number of occurences. Basically I want my data to look like this...

(
  siteA => ('10-9-11' => 3,
            '11-9-11' => 1,
            '12-9-11' => 2),
  siteB => ('04-04-11' =>5,
            '05-05-11' =>1)
)

[download]
I can create the initial entries and new sites and increment the date counter but I'm having trouble adding new dates to the hash reference. 
my %h;
# New site
$h{'siteA'} = {'09-10-2011' => 1};

# Second instance of site and date found, increment.
$a{'siteA'}->{'09-10-2011'}++;

# Another date found for siteA, '10-10-2011'
...

[download]
Can someone please help me add a new hash date entry? I thought I could slice a hash reference but I can't get it working.

In reply to Adding to a hash reference by Anonymous Monk

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