Comments on: Specification Pattern With Predicates http://jeffperrin.com/2006/06/28/specification-pattern-with-predicates/ Jump the Fence or Walk Around Wed, 30 Dec 2009 18:42:13 +0000 http://wordpress.org/?v=2.9 hourly 1 By: Jeff Perrin http://jeffperrin.com/2006/06/28/specification-pattern-with-predicates/#comment-13 Jeff Perrin Fri, 11 Aug 2006 21:19:32 +0000 http://www.jeffperrin.com/index.php/2006/06/28/specification-pattern-with-predicates/#comment-13 Ooops... here's the article: http://www.eps-publishing.com/Article.aspx?quickid=050123 Ooops… here’s the article:

http://www.eps-publishing.com/Article.aspx?quickid=050123

]]> By: Jeff Perrin http://jeffperrin.com/2006/06/28/specification-pattern-with-predicates/#comment-12 Jeff Perrin Fri, 11 Aug 2006 21:18:53 +0000 http://www.jeffperrin.com/index.php/2006/06/28/specification-pattern-with-predicates/#comment-12 Just found this article about the coming features of C# 3.0. In 3.0, the code gets *very* ruby-like: directories.Where(dirInfo => dirInfo.Name == ".svn"); Just found this article about the coming features of C# 3.0. In 3.0, the code gets *very* ruby-like:

directories.Where(dirInfo => dirInfo.Name == “.svn”);

]]> By: Jeff Perrin http://jeffperrin.com/2006/06/28/specification-pattern-with-predicates/#comment-11 Jeff Perrin Fri, 30 Jun 2006 01:56:43 +0000 http://www.jeffperrin.com/index.php/2006/06/28/specification-pattern-with-predicates/#comment-11 The post I linked to by Joe Walnes has a table comparing the C# stuff to Ruby, I think (the link is down right now). I also decided to separate out the predicate into a centralized Spec class, but you could make it more "ruby-like" by inlining to something like: new DirectoryFinder(directories).FindAll( delegate(DirectoryInfo dirInfo) { return dirInfo.Name == “.svn”; }; ); The post I linked to by Joe Walnes has a table comparing the C# stuff to Ruby, I think (the link is down right now). I also decided to separate out the predicate into a centralized Spec class, but you could make it more “ruby-like” by inlining to something like:

new DirectoryFinder(directories).FindAll(
delegate(DirectoryInfo dirInfo) { return dirInfo.Name == “.svn”; };
);

]]> By: Vlad http://jeffperrin.com/2006/06/28/specification-pattern-with-predicates/#comment-10 Vlad Fri, 30 Jun 2006 01:19:23 +0000 http://www.jeffperrin.com/index.php/2006/06/28/specification-pattern-with-predicates/#comment-10 Looks all right to me, though I must admit I like the blocks in ruby so much better. One just passes a nice block of code, and voila. All these contortions that languages like Java and C# go into are a bit annoying :) What would that sort of thing look like in ruby? Something like this I would expect... files = directory.recursively_find(|d|, d.name == ". svn") Looks all right to me, though I must admit I like the blocks in ruby so much better. One just passes a nice block of code, and voila. All these contortions that languages like Java and C# go into are a bit annoying :) What would that sort of thing look like in ruby? Something like this I would expect…

files = directory.recursively_find(|d|, d.name == “. svn”)

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