From: Minkoo Seo <minkoo.seo@...>
Date: 2007-02-04T13:00:05+09:00
Subject: Proc vs lambda vs proc

Hi group(and probably ruby-talk list - is it running btw?).

I got a question on Proc.new and lambda { ... }. AFAIK, there's two
differences between Proc.new(=proc) and lambda. The first one is that
Proc.new does not check the number of arguments passed to it while
lambda does. The secondis that lambda returns as we expect, i.e., it
returns value, while Proc.new does not.

Though Proc.new lacks several advantages that lambda has, I guess
there might be some situation where Proc.new is more suitable than
lambda. As an example, some code blocks that have to executed
thousands times might run more faster than lambda because it does not
have to check the # of arguments, thereby decreasing computational
overhead.

What is your opinion?

Sincerely,
Minkoo Seo