[31] pry(main)> ‘packages‘.classify=> "Package"[33] pry(main)> ‘packages‘.classify.constantize=> Package[40] pry(main)> hash = {key: ‘value‘}=> {:key=>"value"}[41] pry(main)> hash[:key]=> "value"[42] pry(main)> hash[‘key‘]=> nil[44] pry(main)> hash = {key: ‘value‘}.with_indifferent_access=> {"key"=>"value"}[45] pry(main)> hash[:key]=> "value"[46] pry(main)> hash[‘key‘]=> "value"[47] pry(main)> hash[‘key‘]=> "value"[49] pry(main)> app=> #<RecommendApp _id: 539e995277616e7f74000000, created_at: 2014-06-16 07:14:26 UTC, updated_at: 2014-06-16 07:14:26 UTC, type: 1, position: 0, app_id: BSON::ObjectId(‘53970af477616e1878d40100‘)>                  [50] pry(main)> app.position=> 0[51] pry(main)> app.read_attribute :position=> 0[52] pry(main)> app.type=> 1[53] pry(main)> app.type_human