From: "Stephan Kämper" <Stephan.Kaemper@...>
Date: 2005-06-19T16:55:34+09:00
Subject: Re: Newbe questions...

Chuck Brotman wrote:
> Thank you all for your quick and helpful responses!  In retrospect, it seems 
> obvious (ain't it always the way???) .  I was able to get the for/in syntax 
> to work prior to asking the question, butr I couldn't get it to work with 
> "each" . I think I had the styntax wrong I used {} instead of do end, And I 

Both, pairs of curly braces and "do ... end", are valid ways of working 
with 'each'. They mostly differ in precedence

> must have screwed that up because I ened up in never-never-land runing on 
> freeRIDE's irb.  I don't know if it was my or freeride!?).

If you show us the code (and the error message), we could find out what 
went wrong.

> FWIW I like this solution: best due to its succinctness and reradablility::
> 
>  (1..3).each do |i|
> (4..6).each do |j|
> printf "%d, %d, %d\n", i, j, i*j
> end
> end

Note that this

(1..3).each{ |i|
     (4..6).each{ |j|
         printf "%d, %d, %d\n", i, j, i*j
     }
}

is just as valid.


However, many (probably most) people prefer to use curly braces in one 
liners like this

     (4..6).each{ |j| printf "%d, %d, %d\n", i, j, i*j }

and "do ... end" for blocks with more than one line (like the example 
above).


Happy Rubying

Stephan