From: khaines@...
Date: 2006-12-06T20:31:51+09:00
Subject: Re: Lisp comprehensions => SQL

On Wed, 6 Dec 2006, Victor "Zverok" Shepelev wrote:

> Trying to read this:
>
> dbh.select(:Employees) do |e|
>   sort_by(e.age)
>   limit(2,10)
>   (e.name == 'John') & (e.salary > 50)
> end
>
> cause a bunch of questions from Ruby perspective. I "can't understand"
> (intuitively, I mean) "what would be sorted", "what would be limited",
> "where condition applies".

How about this:

employees.select do |e|
   ((e.name == 'John') & (e.salary > 50)).sort_by(e.age)[2..10]
end

I like that syntax, personally.


Kirk Haines