From: Robert Feldt <feldt@...>
Date: 2001-10-11T08:33:51+09:00
Subject: [ruby-talk:22407] Re: list comprehensions alike Python ???

On Thu, 11 Oct 2001, markus jais wrote:

> hello
> 
Hi,

> a few days ago, I bought the "Python 2.1 Bible"
> there (on page 51) is a cool feature described called
> "list comprehension"
> 
> it works like this:
> 
> with python code like this:
> 
> l = [x * x for x in range(1, 11)]    
> 
> I get a list with squares of all numbers of 1-10
> 
> in ruby I could do this with the following code:
> 
> a = Array.new
> (1..10).each { |elem|
> 	a[elem-1] = elem * elem
> }
> 
> is there an even shorter way do to this in ruby??
> 
$ irb
irb(main):001:0> (1..11).map {|v| v*v}
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121]

Short enough for my taste... (but maybe there are some benefits to the
Python way? I don't know any Python.)

Regards,

/Robert