[#6363] Re: rescue clause affecting IO loop behavior — ts <decoux@...>

>>>>> "D" == David Alan Black <dblack@candle.superlink.net> writes:

17 messages 2000/11/14
[#6367] Re: rescue clause affecting IO loop behavior — David Alan Black <dblack@...> 2000/11/14

Hello again --

[#6582] best way to interleaf arrays? — David Alan Black <dblack@...>

Hello --

15 messages 2000/11/26

[#6646] RE: Array Intersect (&) question — Aleksi Niemel<aleksi.niemela@...>

Ross asked something about widely known and largely ignored language (on

23 messages 2000/11/29
[#6652] RE: Array Intersect (&) question — rpmohn@... (Ross Mohn) 2000/11/29

aleksi.niemela@cinnober.com (Aleksi Niemel) wrote in

[#6723] Re: Array Intersect (&) question — Mathieu Bouchard <matju@...> 2000/12/01

> >Use a hash. Here's code to do both and more. It assumes that

[#6656] printing/accessing arrays and hashes — raja@... (Raja S.)

I'm coming to Ruby with a Python & Common Lisp background.

24 messages 2000/11/30

[ruby-talk:6623] Re: Question on sort!

From: Jim Menard <jimm@...>
Date: 2000-11-29 12:10:02 UTC
List: ruby-talk #6623
matz@zetabits.com (Yukihiro Matsumoto) writes:

> In message "[ruby-talk:6601] Re: Question on sort!"
>     on 00/11/28, Dave Thomas <Dave@thomases.com> writes:
> 
> |   ary.sort!.reverse!.each {...
> |
> |It works fine 99.999% of the time, but occasionally fails with some
> |message about some undefined method and nil...
> |
> |Perhaps we're extending the wrong principle here. Just because _some_
> |! methods return nil, should all of them?
> 
> OK, OK.  Let's discuss.
> 
> The principle above have both pro and con.
> 
>   (+) consistency.
>   (-) returning nil somtimes breaks method chains.
> 
> The latter can be avoided if one follows the no-bang-method-chain
> rule.  But I don't force you to agree with me (yet ;-).
> 
> 							matz.

I vote for consistency. I also invoke the "rule of least surprise":

	irb> p [].sort
	[]
	nil
	irb> p [].sort!
	nil
	nil

Perhaps it's too late to change, but I don't like the fact that bang
methods return nil.

Jim
-- 
Jim Menard   jimm@io.com   http://www.io.com/~jimm/   BeOS developer #1283
"Mind you, deep in the IBM VM operating system source we once found a
comment that said 'remember to collect laundry on way home'."
    -- Alan J. Flavell in comp.lang.perl.misc

In This Thread