From: Ryan Davis <ryand-ruby@...>
Date: 2011-02-18T07:32:04+09:00
Subject: Re: question re: small piece of code


On Feb 17, 2011, at 14:17 , Gaba Luschi wrote:

> Hi,
> 
> In the example book I'm using, I ran across the following lines of code:
> 
> young_people = people.find_all do |p|
> p[3].to_i.between?(20,40)
> end
> 
> Now, "people" is defined by 'p' is not - what does that code do when it
> says "do |p|"?

'p' is a block variable. It is used by find_all as it enumerates people. 'p' contains one element from people at a time.