From: Shashank Date <shanko_date@...>
Date: 2005-07-13T02:06:02+09:00
Subject: Re: Question: arrays v. ranges and *.each

Hi David,

--- David Douthitt <ssrat@mailbag.com> wrote:

> The results of the following code just seem strange to me:
> 
>   print "\nTry 1:"
>   print [1..10].class, "\n"
>   [1..10].each { |x| print x, "\n" }

You are mixing two things here: a range and an array.
[1..10] is an array of one object (1..10) which is an
instance of the Range class. 

>   print "\nTry 2:"
>   print [1..10].pop.class, "\n"
>   [1..10].pop.each { |x| print x, "\n" }

so [1..10].pop gives (1..10).

And Range itself is Enumerable.

so: (1..10).each {|i| p i} is a valid construct.


> I would have thought that either 1) try 1 would output a sequence of
> numbers, and try 2 would result in an error (no such method
> Integer#each); or, 2) try 1 would output a series of numbers and try 2
> would result in an error (no such method Range#pop).  Perhaps - another
> option would be 3) try 1 would result in '1..10' and try 2 would result
> in something like '1..1' or an error?
> 
> I'm confused...

HTH,
-- shanko


		
____________________________________________________
Sell on Yahoo! Auctions � no fees. Bid on great items.  
http://auctions.yahoo.com/