From: Joe Bowers <JoeBowers@...>
Date: 2006-05-17T03:26:22+09:00
Subject: Re: Enumerable#collect and #select best practices

-----Original Message-----
From: Daniel Schierbeck [mailto:daniel.schierbeck@gmail.com] 

> I need to collect the results of calling a method on each object in an

> Enumerable that defines that method. Currently, I have this:

>   enum.collect{|obj| obj.a_method rescue nil }.compact

> though this could also work:

This looks like prime .inject territory

  enum.inject([]) do |l,obj| 
    (l << obj.a_method) if obj.respond_to? :a_method
  end