From: Peter Zotov <whitequark@...>
Date: 2012-06-07T07:54:55+09:00
Subject: Re: "Create a rock paper scissors program in ruby WITHOUT using conditionals"

David D. писал 07.06.2012 02:50:
> I'm in an introductory software development class, and my homework is 
> to
> create a rock paper scissors program that takes two arguments (rock,
> paper), etc, and returns the arg that wins.
>
> Now I would make quick work of this problem if I could use 
> conditionals,
> but the assignment says everything we need to know is in the first 
> three
> chapters of the ruby textbook, and these chapters DO NOT include
> conditionals! Would it be possible to create this program without 
> them?
> Or is he just expecting us to be resourceful and use the 
> conditionals.
> It's a very easy assignment with conditionals though...I'm thinking 
> that
> I might be missing something here.

Instead of this:

   if arg == "a"
     1
   elsif arg == "b"
     2
   end

... you can use:

   { "a" => 1, "b" => 2 }[arg]

I leave the rest to your imagination.

-- 
   WBR, Peter Zotov.