From: Nathan Beyer <nbeyer@...>
Date: 2010-03-24T02:22:53+09:00
Subject: what's the suggested raise Exception idiom?

What's the distinction between:
   raise ArgumentError, "the argument was invalid"
and
  raise ArgumentError.new("the argument was invalid")

How does this apply in the case of exceptions with custom initializers
for attributes? For example:
  class StatusCodeError < StandardError
      attr_reader :status_code
      def initialize(status_code)
          @status_code = status_code
      end
  end

I've been reading a lot of code, books and blogs, but haven't gotten
as clear of an understanding on why people choose one way over
another, so I'm looking for additional opinions and commentary.

Thanks