From: William James <w_a_x_man@...>
Date: 2008-03-02T14:49:55+09:00
Subject: Re: counting in for .. in ..

On Mar 1, 4:24 pm, Daniel Liebig <d.lie...@wevin.de> wrote:
> Hi,
>
> i'm doing my first steps in ruby (on rails) and often use things like
>
> for thing in @several_things
>   print thing
> end
>
> Ok so far, looks great :)
>
> But i often need a counter inside of the loop, may it be to create row
> colors or other stuff. What i end up with then is:
>
> i = 0
> for thing in @several_things
>   print thing + " No. " + i.to_s
>   i += 1
> end
>
> Pardon me, but this is ugly, compared to the first clean lines. So far i
> know ruby as an elegant language, so i wouldn't be surpised if there'd
> be any kind of implemented counter in the for loop or a smarter way to
> implement it.
>


E:\>irb --prompt xmp
a = %w(zero one two three)
    ==>["zero", "one", "two", "three"]
a.each_with_index{|x,i| puts "Item no. #{i} is #{x}."}
Item no. 0 is zero.
Item no. 1 is one.
Item no. 2 is two.
Item no. 3 is three.
    ==>["zero", "one", "two", "three"]