RUBY

get single hash key ruby

h.key(value)

hash get key ruby

    #!/usr/bin/ruby   
      
    class States   
       @@no_of_states=0   
       def initialize(name)   
          @states_name=name   
          @@no_of_states += 1   
       end   
       def display()   
         puts "State name #@state_name"   
        end   
        def total_no_of_states()   
           puts "Total number of states written: #@@no_of_states"   
        end   
    end   
      
    # Create Objects   
    first=States.new("Assam")   
    second=States.new("Meghalaya")   
    third=States.new("Maharashtra")   
    fourth=States.new("Pondicherry")   
      
    # Call Methods   
    first.total_no_of_states()   
    second.total_no_of_states()   
    third.total_no_of_states()   
    fourth.total_no_of_states()  

get specific key value from array of hashes in ruby

values = ary.map{|h| h[13]}.compact