From: Michael Bruschkewitz <brusch2@...>
Date: 2003-02-23T21:46:56+09:00
Subject: Re: Return Values of [] for Array, Hash,... (ruby 1.6.8)

In article <20030220223127.GA32672@uk.tiscali.com>, B.Candler@pobox.com 
says...
>   h[5]=3  is  shorthand for   h.send("[]=",5,3)
>   c.v=7   is  shorthand for   c.send("v=",7)
> Both those are method calls (to objects referred to by local varables h and
> c). But
>   e=7
> is an assignment to a local variable, because there is no explicit object
> receiver given. Local variable 'e' then contains an objectref for the Fixnum
> which represents the number 7.
So, when there is a function:
def fu h, key, o
	e = h[key]
	e.val = f1(o)
	e.val2 = f2(o)
end
.... these will (under most preconditions) change the content of the 
hash, and including "h[key]=e" at the end will be unnecessary - because
the existence of "val=" and "val2=" grants there is an object receiver.
Right?

Michael B.