From: Martin DeMello <martindemello@...>
Date: 2006-12-24T10:14:33+09:00
Subject: Re: Merry (slightly early) Christmas! Mr. Neighborly's Humble Little Ruby Book is free!

On 12/23/06, Tyler Prete <psyonic@gmail.com> wrote:
> This book is really great!  I'm familiar with most of the material already,
> but I'm enjoying reading through it all the same.  One question I have (a
> question of preference more than correctness) is in your example dealing
> with blocks and yield, why do you choose to use while with an interator:
>
> def myeach(myarray)
>   iter = 0
>   while (iter < myarray.length):
>     yield(myarray[iter])
>     iter += 1
>   end
> end
> testarray = [1,2,3,4,5]
> myeach(testarray) {|item| print "#{item}:"}
> → 1:2:3:4:5:
>
> Rather than using what seems (to me at least) the more Ruby way:
>
> def myeach(myarray)
>   for elem in myarray
>     yield elem
>   end
> end
>
> That way you're not using an extra variable or having to worry about array
> length.
>
> A funny way to write it would be using blocks:
> def myeach(myarray)
>   myarray.each { |elem| yield(elem) }
> end
>
> but I think that way basically defeats the purpose of your example ;)

"for i in collection" is converted by the parser to collection.each do
|i|, so it comes to the same thing as your last example (:

martin