From: Yukihiro Matsumoto <matz@...>
Date: 2009-08-27T08:00:09+09:00
Subject: Re: ||= with 1.8 and 1.9 ?

Hi,

In message "Re: ||= with 1.8 and 1.9 ?"
    on Thu, 27 Aug 2009 01:20:20 +0900, Rick DeNatale <rick.denatale@gmail.com> writes:

|a = b = c
|
| is treated the same as
|
|b = c; a = c
|
|in other words the result of the b= is ignored.

No, 

  a = b = c

is parsed as

  a = (b = c)

so, result of the latter assignment is used for the former assignment.
The point is when b here is an attribute assignment (e.g. foo.b = c),
the result value from the setter method (b=) is ignored.


|That's why sending :bar= is giving the result of the method.
|
|As for why Ruby1.9 is treating the ||= form differently, I haven't
|figured that out.
|
|
|
|-- 
|Rick DeNatale
|
|Blog: http://talklikeaduck.denhaven2.com/
|Twitter: http://twitter.com/RickDeNatale
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|