From: Mike Stephens <rubfor@...>
Date: 2011-01-18T22:06:16+09:00
Subject: Re: Calling by Reference - Two Questions

Josh Cheek wrote
> def ary.swap
>   new_contents = [ self[1] , self[0] ]
>   replace new_contents
> end

That kind of just moves the question on to how does replace work. But
thank you for showing me replace, and even more for opening my eyes to
an exciting world of singletons.

>
> def ary.my_reverse
>   lower , higher = 0 , size-1
>   while lower < higher
>     self[lower] , self[higher] = self[higher] , self[lower]
>     lower  += 1
>     higher -= 1
>   end
>   self
> end
>
That does work (and doesn't need the last self). It seems to agree with
the Jesus rule, that you can assign to self but only
component-by-component.

I guess your answers give me everything I would ever need!

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