metaprogramming - Ruby: Dynamically create new classes -

i'm trying dynamically create set of classes follows.

class foo     attr_reader :description end  ['alpha', 'beta', 'gamma'].each |i|   klass = class.new(foo) |i|     def initialize       @description =     end   end   object.const_set(i, klass) end 

rather creating each class manually, e. g.:

class alpha < foo   def initialize      @description = 'alpha'   end end 

what right way such thing , how pass iterator nested block?

how pass iterator nested block?

by using nested block. def not block. def cuts off visibility of variables outside def. block on other hand can see variables outside block:

class foo     attr_reader :description end  ['alpha', 'beta', 'gamma'].each |class_name|   klass = class.new(foo)      define_method(:initialize)       @description = class_name     end   end    object.const_set(class_name, klass) end  = alpha.new p a.description  --output:-- "alpha" 

you can want without having create nested block or class foo:

['alpha', 'beta', 'gamma'].each |class_name|   klass = class.new()     def initialize       @description = self.class.name     end      attr_reader :description    end    object.const_set(class_name, klass) end  --output:-- "alpha" "gamma"