27 Feb '12, 7am

How to add a instance variable through a mixin? - Ruby Forum:

On 2/12/08, [email protected] <[email protected]> wrote: > end > object of MyClass. You don't really add instance variables for the instances of classes to classes in Ruby. http://talklikeaduck.denhaven2.com/articles/2008/02/08/whose-variable-is-it-anyway If you add a method to a class through a mixin which refers to an instance variable, the variable will be created dynamically in the instance as needed when the method is run. if you want to initialize it to something other than nil, you can use techniques like lazy initialization. module M def iv @iv ||= 0 # or whatever you want the default value to be end end -- Rick DeNatale My blog on Ruby http://talklikeaduck.denhaven2.com/

Full article: http://www.ruby-forum.com/topic/142444

Tweets

Ruby Summary: Ruby Study Notes - Best Ruby Guid...

rubylearning.com 26 Feb '12, 4pm

Ruby Modules are similar to classes in that they hold a collection of methods, constants, and other module and class defin...

Class and Instance Variables In Ruby // RailsTi...

railstips.org 02 Mar '12, 10am

Update (6/13/2008): I posted a bit more on the topic with example uses in the wild . First, let me preface this article wi...

IO.peopen("tail -f access_log") とかするんなら普通にFile....

ruby-forum.com 27 Feb '12, 7am

Actually, I am not sure how this would work. If I do this, I get no output from the file: `tail -f sim.out` So there is so...

#Ruby Ruby in Twenty Minutes

ruby-lang.org 03 Mar '12, 9am

This is a small Ruby tutorial that should take no more than 20 minutes to complete. It makes the assumption that you alrea...