From: Paul Butcher <paul@82ask.com>
Date: 2007-09-16T20:44:16+09:00
Subject: Re: Solving the Zurg puzzle in Ruby

Frederick Cheung wrote:
> Replacing
> 
>  def cost
>    who.collect(&:time).max
>  end
> 
>  with
> 
>  who.inject(0) { |current_max, toy| toy.time > current_max ? toy.time : 
> current_max }
> 
> makes paul's solution run 5.5 times faster on my machine (in around 29 
> seconds). Still slower than Brian's (which takes 24 seconds), but

And replacing it with:

who.max {|a, b| a.time <=> b.time}.time

(which is actually the way that I wrote it initially - but I thought 
that the solution using collect was clearer!) gets my solution and 
Brian's running in vitually identical times.

Paul
-- 
Posted via http://www.ruby-forum.com/.