From: Gary Wright <gwtmp01@...>
Date: 2011-02-26T05:32:01+09:00
Subject: Re: how to override the new/initialize method for a struct?


On Feb 25, 2011, at 1:51 PM, jtprince wrote:

> How do I make a custom initializer for a struct object?  This is how I would expect it to be accomplished (but this does not work):
> 
> Dog = Struct.new(:bark, :bite) do
>  def initialize(*args)
>    super(*args)
>    bark = "really loud" unless bark
>  end
> end
> 
> dd = Dog.new
> p dd.bark # => should be "really loud" but is nil
> 
> So, structs have no initialize method...  I tried some other approaches but no luck yet.  Can anyone figure out how to do this?

I think your problem is just on one line. Make this change:

>    self.bark = "really loud" unless bark


Without that change you are assigning to a local variable and not to the 'bark' attribute/instance variable.


Gary Wright