From: Joshua Ballanco <jballanc@...>
Date: 2010-04-06T10:31:29+09:00
Subject: [ruby-core:29272] Re: Proposal: Module#thunk_method

On Apr 5, 2010, at 5:42 PM, Charles Oliver Nutter wrote:

> This would eliminate define_method cases like this:
> 
> # lazy-memozing value method
> def value
> a = some_expensive_calculation
> self.class.class_eval {define_method(:value) {a}}
> end

Why not just do this?

# lazy-memoizing with a class var:
def value
 @@a ||= some_expensive_calculation
end