From: matz@... (Yukihiro Matsumoto)
Date: 2003-02-19T13:44:04+09:00
Subject: Re: String#+ operatorbroken?

Hi,

In message "Re: String#+ operatorbroken?"
    on 03/02/19, Jason Persampieri <ruby@persampieri.net> writes:
|> Remember, s += "whatever" is a syntax sugar for
|> 
|>   s = s + "whatever"

|Hmm.  Would it make sense to 'special-case' that?  They accomplish the same thing logically
|(right?), and I would expect a language to evolve out these hidden 'performance-bombs'.  In fact,
|anytime there's an operator= method, maybe it should never allocate a new object?

They are not same:

 s = p = ""
 s += "foo"
 p s  # "foo"
 p p  # ""

 s = p = ""
 s << "foo"
 p s  # "foo"
 p p  # "foo"


							matz.