Question

I have the following Ruby module:

module Test
  Constant1 = {
    :key1 => :value1,
    :key2 => :value2    
  }

  Constant2 = {
    :key1 => :value1,
    :key2 => :value2    
  }
end

And I am trying to iterate through the declared Hash constants to print all the keys defined with the following code:

Test.constants.each do |constant|
  constant.keys.each do |key|
    puts "key: #{key}"
  end
end

But I get a NoMethodError: undefined method 'keys' for "Constant2":String and I don’t know how to convert that String into a real costant. Anyone knows how to do it?

Answer 1

This works:

Test.constants.each do |constant|
  Test.const_get(constant).keys.each do |key|
    puts "key: #{key}"
  end
end