From: matz@... (Yukihiro Matsumoto)
Date: 2002-01-24T23:49:47+09:00
Subject: Re: Array.last Weirdness

Hi,

In message "Re: Array.last Weirdness"
    on 02/01/24, Tobias Reif <tobiasreif@pinkjuice.com> writes:

|Thank you very much. But I still don't understand :|

Too bad.

|Without knowing "the internals", they all seem to say the same:
|
|<last item> = <last item> + <string>
|
|a[-1]       = a[-1]       + ' bar'
|
|array.last  = array.last  + ' bar'
|
|or
|array.last += " world"

OK, I'll try to explain again.

  a[-1] += b

means

  a[-1] = a[-1] + b

means

  a.[]=(-1, a.[](-1)+b)

OK?  And, accordingly,

  a.last += b

means

  a.last = a.last + 1

means

  a.last=(a.last+1)

this causes error because there's no "last=" method.

|While I know why the last two don't work (because there is no #last= 
|mehtod), I would expect all of the following to result in the same (or I 
|think it would be possible, and great, if they did):

I guess you mean you expect attribute setter for every attribute
getter, but it doesn't always make sense.

							matz.