From: Tyler Prete <psyonic@...>
Date: 2006-12-23T07:41:59+09:00
Subject: Re: Merry (slightly early) Christmas! Mr. Neighborly's Humble Little Ruby Book is free!

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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

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