From: michael libby <x@...>
Date: 2002-10-30T11:05:19+09:00
Subject: Re: executing a proc passed as an argument?

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On Tuesday 29 October 2002 19:36, Alan (Ursus Major) wrote:
> class Callback
>
>  def initialize (v, &m)
>   @cb = m          #store a callback method
>   @v = v            #store an argument to pass the method
>  end
>
>  def exe
>   #  @cb(@v)            #execute the stored method (not this way!)

@cb.call(@v) #invokes method stored in @cb with @v as argument

>   p "called exe, value = #{@v}"      #stored the value, and
>   p "stored method =  #{@cb}"      #maybe the proc?
>  end
> end
>
> x = Callback.new("a value", &proc{|v| p v})

x = Callback.new("a value"){|v| p v}   #much prettier, imho

> x.exe

Hope this helps.

 -michael

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