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somebox/gist:6553626

Created September 13, 2013 17:29
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gistfile1.txt
>> h={a:true,b:false,c:1}
=> {:a=>true, :b=>false, :c=>1}
>> h[:a].present?
=> true
>> h[:a].presence
=> true
>> h[:b].present?
=> false
>> h[:b].presence
=> nil
>> h[:c].present?
=> true
>> h[:c].presence
=> 1
>>
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