From: nobu.nokada@...
Date: 2002-11-15T09:19:55+09:00
Subject: Re: Syntactic Sugar Question

Hi,

At Fri, 15 Nov 2002 09:01:26 +0900,
Bret Jolly wrote:
> This is evidently syntax sugar for
> 
> foo = (foo || "oink")

This expression is an assignment.

> To add to the mystery,
> 
> foo ||= false unless not foo

This equivalents to

  foo = false unless foo unless not foo
  foo = false if not foo if foo
  foo = false if not foo and foo
  foo = false if false

Therefore, the assignment never occur.

-- 
Nobu Nakada