From: Jeremy McAnally <jeremymcanally@...>
Date: 2006-12-26T07:46:57+09:00
Subject: Re: Merry (slightly early) Christmas! Mr. Neighborly's Humble Little Ruby Book is free!

Hey Tyler,
While thats the most Rubyish way to do it, at that point in the text I
hadn't covered those sorts of loops/iterators yet and thought that the
while method would be more familiar to those reading.  I may change it
in the next revision, but I'm not sure. :)

--Jeremy

On 12/22/06, 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 ;)
>
> Anyway, I'm just interested in your thoughts about this.  You most likely
> have your reasons and they probably make sense; after all, you're the one
> out there writing books :)
>
> Thanks and keep up the good work,
> Tyler Prete
>
>