968 5 attr_reader for class variables attr reader for class variables 2011-03-20 14:21:04 2011-03-23 14:19:05 Method 1: class_eval with string {{{ class Class def _attr_reader *vars vars.each do |var| class_eval <<-COD def self.#{var} @@#{var} end COD end end end }}} Method 2: define_method and class_variable_get {{{ class Class def _attr_reader *vars vars.each do |var| self.class.send(:define_method, var) do class_variable_get "@@#{var}" end end end end }}} Testing: {{{ class Test @@foo = 'hihaha' @@bar = 'eita' _attr_reader :foo, :bar end puts Test.foo #=> hihaha puts Test.bar #=> eita }}} I prefer the second way because I tend to avoid "evals", due to performance issues of parsing strings. You could use class_eval with a block instead of string, but it's method 2 with more code: Method 3: class_eval with a block {{{ class Class def _attr_reader *vars vars.each do |var| class_eval do self.class.send(:define_method, var) do class_variable_get "@@#{var}" end end end end end }}} Method 4: instance_eval: {{{ class Class def _attr_reader *vars vars.each do |var| (class << self; self; end).instance_eval do define_method(var) do class_variable_get "@@#{var}" end end end end end }}} 1 0 0 0 0 language ruby 1 language English 1 categ Ruby experiences 1 categ list 1