From: Joel VanderWerf <vjoel@...>
Date: 2007-10-26T02:28:54+09:00
Subject: Re: Intervals in Ruby

James Edward Gray II wrote:
> On Oct 25, 2007, at 1:40 AM, Robert Klemme wrote:
> 
>> Both range versions come in handy, for example, if you need to iterate 
>> through an array using an index counter then the triple dot is 
>> convenient because you do not need to to math:
>>
>> for i in 0...ar.size
>>   puts ar[i]
>> end
>>
>> #times is an alternative here
>>
>> ar.size.times do |i|
>>   puts ar[i]
>> end
> 
>  >> letters = (0..9).map { |i| (?a + i).chr }
> => ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]
>  >> letters.each_index do |i|
> ?>   puts letters[i]
>  >> end
> a
> b
> c
> d
> e
> f
> g
> h
> i
> j
> => ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]

What was that example meant to show? Must be something other than this:

puts ("a".."j").to_a

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407