From: Julian Leviston <julian@...>
Date: 2009-02-03T15:48:14+09:00
Subject: Re: choose parameter to solve for

What do you mean?

Blog: http://random8.zenunit.com/
Learn rails: http://sensei.zenunit.com/

On 03/02/2009, at 5:10 PM, Jason Lillywhite  
<jason.lillywhite@gmail.com> wrote:

> I'm looking for a clean way to write a function that allows me to  
> choose
> which parameter to solve for assuming all others are known. Is it good
> design to do something like this: ?
>
> class Foo
>  def initialize(x, y, z)
>    @x, @y, @z = x, y, z
>  end
>
>  def function(var)
>    if @x.nil?
>      @x = var
>    elsif @y.nil?
>      @y = var
>    else
>      @z = var
>    end
>    @x + @y + @z
>  end
>
> end
>
> z = Foo.new(1, 2, nil)
> z.function(3)
> => 6
> ??
> -- 
> Posted via http://www.ruby-forum.com/.
>