From: Yukihiro Matsumoto <matz@...>
Date: 2010-09-09T10:31:03+09:00
Subject: [ruby-core:32192] Re: Making custom_lambda() work

Hi,

In message "Re: [ruby-core:32171] Re: Making custom_lambda() work"
    on Thu, 9 Sep 2010 04:57:51 +0900, Joshua Ballanco <jballanc@gmail.com> writes:
|On Sep 8, 2010, at 9:57 AM, Nikolai Weibull wrote:

|> I realize that I���m breaking the thread, but why is the calling of
|> lambdas with parentheses such an important issue?  I���ve never missed
|> it.  Having to write foo.call never seemed like an issue to me.  I
|> sort of like the lack of parentheses.
|
|Well, personally my reason for wanting to do this is mildly subversive. It would, in effect, make methods and lambdas much closer to being equivalent:

Method objects and lambdas are already VERY close to equivalent:

  class Worker
    def make_it
      "A regular method"
    end
  end

  class Factory
    def initialize(worker)    
      @worker = worker
    end
    def do_it
      @worker.call
    end
  end

  # a lambda (function object)
  lambda = lambda{"lambda"}
  p Factory.new(lambda).do_it

  # a method object
  method = Worker.new.method(:make_it)
  p Factory.new(method).do_it

							matz.