From: mark sparshatt <msparshatt@...>
Date: 2005-03-31T04:41:03+09:00
Subject: Re: beginner iterators question

Jeff Fry wrote:
> Hi,
> 
> I am brand new to ruby and liking it so far - particularly the watir 
> test libraries. I am comfortable with the Java for loop syntax (i=0, 
> i<4, i++) and haven't found something in ruby that feels as elegant, 
> particularly when I want to use an increasing value i within the loop. 
> Here's an example (with my limited ruby)
> 
>        i=0
>        0.upto(3) do                                         puts 'try 
> number ' + i.to_s                   i = 
> i+1                                     # is there a more elegant way to 
> do i++ ?
>        end
> 

how about this

0.upto(3) do |i|
   puts 'try number ' + i.to_s
end

the upto method passes the current value into the block when calling it.

also another way of writing i++ is i += 1

> I am guessing that ruby provides a more elegant way to do the above. I 
> would love recommendations both on how to iterate when I want to use the 
> changing value of the iterator in the loop, and how in ruby to do i++. 
> Is there a way with upto() to use the current value during iteration? or 
> another iterator where that is possible without needing to define i 
> seperately?
> 

hth

--
Mark Sparshatt