From: Siratinee Sukachai <ploy.sukachai@...>
Date: 2011-04-20T13:02:19+09:00
Subject: Can I check contain value in hash?

I have hash which is contain list of string value.
I need to check is the value already contained in the key.
Add add the value to the key if the key is not contained that value.
Can I do that?

like in c#

if(!dict[key].contains(value))
{
  dict[key].add(value);
}

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