From: Devin Mullins <twifkak@...>
Date: 2005-08-20T06:02:52+09:00
Subject: Re: Python vs Ruby!

Jamey Cribbs wrote:

> def select(&select_cond)
>    result = []
>    @db.engine.get_recs(self).each do |rec|
>        result << rec if select_cond.call(rec)      end
>    return result
> end  

Why not:
def select
  result = []
  @db.engine.get_recs(self).each { |rec| result << rec if yield rec }
  result
end

Or if get_recs returns an Enumerable:
def select(&select_cond)
  @db.engine.get_recs(self).select(&select_cond)
end

Or if not:
def select(&select_cond)  #this is probably not very performant
  @db.engine.get_recs(self).extend(Enumerable).select(&select_cond)
end

Sorry, can't help it, it's like a tic. YMMV.

Kirk Haines wrote:

>I *heart* that sort of query syntax.  You'll see much the same thing in the 
>Kansas ORM:
>
>results = ksdbh.select(:Planes) {|r| (r.country == 'USA') & (r.speed > 350)}
>
>In this case, method_missing magic is mixed into that in such a way that the 
>Ruby code becomes a SQL statement for querying a relational database.
>  
>
That is awesome, and my hat is off to you.

Devin