Monks, please help. I need to find the unique number of values in a hash of hashes. For example, given the array below, I need to know how many kids are 12 years old. 
%hoh = (
 kevin => {
   age   => "12",
   favorite_color       => "blue",
   gender       => "boy",
 },
 john => {
   age   => "11",
   favorite_color       => "green",
   gender       => "boy",
 },
 lisa => {
   age   => "11",
   favorite_color       => "pink",
   gender       => "girl",
 },
 sara => {
   age   => "13",
   favorite_color       => "purple",
   gender       => "girl",
 },
 shelly => {
   age   => "12",
   favorite_color       => "purple",
   gender       => "girl",
 },
);

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How many kids are 12? In this case 2. Is there a quick way to get this number without looping through each hash and counting?

In reply to Find number of unique values in hash by rethaew

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