[#56333] [CommonRuby - Feature #8723][Open] Array.any? predicate returns true for empty array. — "nurettin (Nurettin Onur TUGCU)" <onurtugcu@...>
12 messages
2013/08/02
[#56346] [CommonRuby - Feature #8723] Array.any? predicate returns true for empty array.
— "nurettin (Nurettin Onur TUGCU)" <onurtugcu@...>
2013/08/03
[#56368] [ruby-trunk - Bug #8730][Open] "rescue Exception" rescues Timeout::ExitException — "takiuchi (Genki Takiuchi)" <[email protected]>
15 messages
2013/08/04
[#56858] [ruby-trunk - Bug #8730] "rescue Exception" rescues Timeout::ExitException
— "nobu (Nobuyoshi Nakada)" <nobu@...>
2013/08/29
[#57017] Re: [ruby-trunk - Bug #8730] "rescue Exception" rescues Timeout::ExitException
— KOSAKI Motohiro <kosaki.motohiro@...>
2013/09/04
2013/8/28 nobu (Nobuyoshi Nakada) <[email protected]>:
[#56389] [ruby-trunk - Feature #8738][Open] Integer#single_bit? (Actually Fixnum#single_bit? and Bignum#single_bit?) — "akr (Akira Tanaka)" <akr@...>
5 messages
2013/08/05
[#56407] [ruby-trunk - misc #8741][Open] email notification on bugs.ruby-lang.org is broken — "rits (First Last)" <redmine@...>
18 messages
2013/08/05
[#56517] Re: [ruby-cvs:49638] zzak:r42496 (trunk): * lib/time.rb: [DOC] Document constants by @markijbema [Fixes GH-377] — Tanaka Akira <akr@...>
2013/8/11 <[email protected]>:
3 messages
2013/08/10
[#56523] [ruby-trunk - Bug #8769][Open] [PATCH] process.c (rb_fork_internal): remove cloexec setting — "normalperson (Eric Wong)" <normalperson@...>
7 messages
2013/08/10
[#56524] [ruby-trunk - Bug #8770][Open] [PATCH] process.c: avoid EINTR from Process.spawn — "normalperson (Eric Wong)" <normalperson@...>
19 messages
2013/08/10
[#56536] [ruby-trunk - Feature #8772][Open] Hash alias #| merge, and the case for Hash and Array polymorphism — "trans (Thomas Sawyer)" <redmine@...>
24 messages
2013/08/11
[#56551] [CommonRuby - Feature #8777][Open] Process.mach_absolute_time — "tenderlovemaking (Aaron Patterson)" <tenderlove@...>
5 messages
2013/08/11
[#56567] [ruby-trunk - Feature #8780][Assigned] DBM#to_h alias for #to_hash — "zzak (Zachary Scott)" <e@...>
4 messages
2013/08/12
[#56569] [ruby-trunk - Feature #8781][Open] Use require_relative() instead of require() if possible — "ko1 (Koichi Sasada)" <redmine@...>
31 messages
2013/08/12
[#56596] Re: [ruby-trunk - Feature #8781][Open] Use require_relative() instead of require() if possible
— SASADA Koichi <ko1@...>
2013/08/13
(2013/08/12 15:35), ko1 (Koichi Sasada) wrote:
[#56582] [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— "drbrain (Eric Hodel)" <[email protected]>
2013/08/12
[#56584] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— SASADA Koichi <ko1@...>
2013/08/12
(2013/08/13 2:25), drbrain (Eric Hodel) wrote:
[#56636] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Aaron Patterson <tenderlove@...>
2013/08/16
On Tue, Aug 13, 2013 at 07:38:01AM +0900, SASADA Koichi wrote:
[#56638] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— SASADA Koichi <ko1@...>
2013/08/16
(2013/08/16 14:21), Aaron Patterson wrote:
[#56643] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Aaron Patterson <tenderlove@...>
2013/08/16
On Fri, Aug 16, 2013 at 03:00:59PM +0900, SASADA Koichi wrote:
[#56647] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Rodrigo Rosenfeld Rosas <rr.rosas@...>
2013/08/16
Em 16-08-2013 03:24, Aaron Patterson escreveu:
[#56675] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Aaron Patterson <tenderlove@...>
2013/08/17
On Fri, Aug 16, 2013 at 09:35:04AM -0300, Rodrigo Rosenfeld Rosas wrote:
[#56669] [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— "trans (Thomas Sawyer)" <redmine@...>
2013/08/16
[#56674] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Aaron Patterson <tenderlove@...>
2013/08/17
On Sat, Aug 17, 2013 at 07:17:50AM +0900, trans (Thomas Sawyer) wrote:
[#56686] Re: [ruby-trunk - Feature #8781] Use require_relative() instead of require() if possible
— Nobuyoshi Nakada <nobu@...>
2013/08/17
(13/08/17 13:13), Aaron Patterson wrote:
[#56634] [ruby-trunk - Feature #8788][Open] use eventfd on newer Linux instead of pipe for timer thread — "normalperson (Eric Wong)" <normalperson@...>
11 messages
2013/08/16
[#56683] Re: [ruby-trunk - Feature #8788][Open] use eventfd on newer Linux instead of pipe for timer thread
— SASADA Koichi <ko1@...>
2013/08/17
(2013/08/16 10:47), normalperson (Eric Wong) wrote:
[#56700] Re: [ruby-trunk - Feature #8788][Open] use eventfd on newer Linux instead of pipe for timer thread
— Eric Wong <normalperson@...>
2013/08/17
SASADA Koichi <[email protected]> wrote:
[#56761] Re: [ruby-trunk - Feature #8788][Open] use eventfd on newer Linux instead of pipe for timer thread
— KOSAKI Motohiro <kosaki.motohiro@...>
2013/08/20
Hi
[#56763] Re: [ruby-trunk - Feature #8788][Open] use eventfd on newer Linux instead of pipe for timer thread
— Eric Wong <normalperson@...>
2013/08/20
KOSAKI Motohiro <[email protected]> wrote:
[#56658] [ruby-trunk - Feature #8796][Open] Use GMP to accelerate Bignum operations — "akr (Akira Tanaka)" <akr@...>
5 messages
2013/08/16
[#56672] Re: [ruby-cvs:49733] eregon:r42591 (trunk): * process.c (rb_clock_gettime): document CLOCK_REALTIME and — Tanaka Akira <akr@...>
2013/8/17 <[email protected]>:
4 messages
2013/08/17
[#56678] Re: [ruby-cvs:49733] eregon:r42591 (trunk): * process.c (rb_clock_gettime): document CLOCK_REALTIME and
— Benoit Daloze <eregontp@...>
2013/08/17
On 17 August 2013 02:52, Tanaka Akira <[email protected]> wrote:
[#56746] [ruby-trunk - Bug #8803][Open] Another buffer overflow — "user021 (a s)" <user021@...>
6 messages
2013/08/19
[#56753] [ruby-trunk - Feature #8804][Open] ONCE syntax — "ko1 (Koichi Sasada)" <redmine@...>
7 messages
2013/08/20
[#56762] [ruby-trunk - Bug #8805][Open] Ruby GC::Profiler returns incorrect info on Solaris (and relatives) — "sax (Eric Saxby)" <sax@...>
8 messages
2013/08/20
[#56780] [ruby-trunk - Feature #8809][Open] Process.clock_getres — "akr (Akira Tanaka)" <akr@...>
7 messages
2013/08/22
[#56795] [ruby-trunk - Bug #8816][Open] Tempfile.new may return the same name for parallel calls — "375gnu (Hleb Valoshka)" <redmine@...>
4 messages
2013/08/24
[#56809] [ruby-trunk - Feature #8820][Open] Speed up Array#index — "trans (Thomas Sawyer)" <redmine@...>
5 messages
2013/08/26
[#56811] Re: [ruby-trunk - Feature #8820][Open] Speed up Array#index
— Eric Wong <normalperson@...>
2013/08/26
"trans (Thomas Sawyer)" <[email protected]> wrote:
[#56824] [ruby-trunk - Feature #8823][Open] Run trap handler in an independent thread called "Signal thread" — "ko1 (Koichi Sasada)" <redmine@...>
14 messages
2013/08/27
[#56825] Re: [ruby-trunk - Feature #8823][Open] Run trap handler in an independent thread called "Signal thread"
— Tanaka Akira <akr@...>
2013/08/27
2013/8/27 ko1 (Koichi Sasada) <[email protected]>:
[#56850] [ruby-trunk - Feature #8823] Run trap handler in an independent thread called "Signal thread"
— "kosaki (Motohiro KOSAKI)" <kosaki.motohiro@...>
2013/08/28
[#56862] [ruby-trunk - Feature #8823][Feedback] Run trap handler in an independent thread called "Signal thread"
— "ko1 (Koichi Sasada)" <redmine@...>
2013/08/29
[#56839] [ANN] Ruby Developer Meeting 20130831 — "NARUSE, Yui" <naruse@...>
Hi,
7 messages
2013/08/28
[#57129] Re: [ANN] Ruby Developer Meeting 20130831
— "NARUSE, Yui" <naruse@...>
2013/09/11
Hi,
[#56861] [ruby-trunk - Feature #3620] Add Queue, SIzedQueue and ConditionVariable implementations in C in addition to ruby ones — "ko1 (Koichi Sasada)" <redmine@...>
6 messages
2013/08/29
[#56865] Re: [ruby-trunk - Feature #3620] Add Queue, SIzedQueue and ConditionVariable implementations in C in addition to ruby ones
— Eric Wong <normalperson@...>
2013/08/29
"ko1 (Koichi Sasada)" <[email protected]> wrote:
[#56866] [ruby-trunk - Feature #8834][Open] Kernel#load_relative — "sawa (Tsuyoshi Sawada)" <sawadatsuyoshi@...>
7 messages
2013/08/30
[#56890] [ruby-trunk - Feature #8839][Open] Class and module should return the class or module that was opened — "headius (Charles Nutter)" <headius@...>
26 messages
2013/08/30
[#56894] [ruby-trunk - Feature #8840][Open] Yielder#state — "marcandre (Marc-Andre Lafortune)" <ruby-core@...>
14 messages
2013/08/30
[#56911] [ruby-trunk - Feature #8846][Open] Publicize Module#include — "matsuda (Akira Matsuda)" <ronnie@...>
6 messages
2013/08/31
[ruby-core:56599] [ruby-trunk - Feature #7738] Deprecate Set#+ as an alias of Set#|, use it for symmetric difference. Introduce Hash#| for Hash#reverse_merge in Rails.
From:
"knu (Akinori MUSHA)" <knu@...>
Date:
2013-08-13 11:32:18 UTC
List:
ruby-core #56599
Issue #7738 has been updated by knu (Akinori MUSHA).
=begin
I think it is unusual in ruby for an operator to raise an exception depending on the combination of the values of operands.
It is like (({x + 1})) raising an exception when (({x})) is (({3})) while it successfully returns (({5})) when (({x})) is (({4})).
I can't imagine how it could be used usefully and properly.
Now that we have Set#disjoint?, guarding (({x | y})) with (({if x.disjoint?(y)})) is much more straightforward and handy than having to rescue (({x | y})) in case it raises an exception.
=end
----------------------------------------
Feature #7738: Deprecate Set#+ as an alias of Set#|, use it for symmetric difference. Introduce Hash#| for Hash#reverse_merge in Rails.
https://bugs.ruby-lang.org/issues/7738#change-41135
Author: alexeymuranov (Alexey Muranov)
Status: Open
Priority: Normal
Assignee: knu (Akinori MUSHA)
Category: lib
Target version: Next Major
=begin
I am almost sure this will be rejected, but i want to try anyway. My goal is to propose a more efficient and consistent use of binary operator symbols for some classes, in this case for (({Set})) and (({Hash})).
I propose to deprecate (({Set#+})) as an alias of (({Set#|})), and use (({Set#+})) later for the ((*symmetric difference*)) of sets. I think that operator symbols like (({+})) and (({|})) are too precious to alias one another.
Currently (({Set#+})) is probably the only use of (({#+})) for an operation which is not ((*injective*)) in each of the arguments: for sets (({a})), (({b})), (({c})), the equality
a + b == a + c
does not currently imply
b == c
The natural binary operation on sets that is injective in each argument is the ((*symmetric difference*)), it corresponds to the bitwise XOR. I have also noticed that the "(({+}))" for sets is used in "Lectures on ergodic theory " by P. Halmos to denote the symmetric difference.
I also suggest for to define (({Hash#|})) as Hash#reverse_merge in Rails, in my opinion this would correspond nicely to (({Set#|})).
=end
--
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