From: Yusuke Endoh <mame@tsg.ne.jp>
To: ruby-core@ruby-lang.org
Subject: [ruby-core:40556] [ruby-trunk - Feature #5321] Introducing Numeric#exact? and Numeric#inexact?
Date: Mon, 31 Oct 2011 21:55:07 +0900 [thread overview]
Message-ID: <redmine.journal-21697.20111031215507@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-5321.20110914132016@ruby-lang.org
Issue #5321 has been updated by Yusuke Endoh.
Hello,
2011/9/14 Kenta Murata <muraken@gmail.com>:
> Now, Ruby's numeric classes doesn't provide predicators to investigate the exactness of their instances.
> So, if we want to examine whether a number is exactly zero, we must investigate the class of the number.
> I want simple way to examine the number exactness.
Can you show any actual use case?
--
Yusuke Endoh <mame@tsg.ne.jp>
----------------------------------------
Feature #5321: Introducing Numeric#exact? and Numeric#inexact?
http://redmine.ruby-lang.org/issues/5321
Author: Kenta Murata
Status: Assigned
Priority: Normal
Assignee: Yukihiro Matsumoto
Category:
Target version:
Ruby has several numeric classes such as Integer.
These classes are classified whether their instances represent numbers exactly.
According to this, Integer and Rational are exact, and Float and BigDecimal are inexact because they're always including error.
The exactness of a Complex depends on its real and imaginary parts.
Now, Ruby's numeric classes doesn't provide predicators to investigate the exactness of their instances.
So, if we want to examine whether a number is exactly zero, we must investigate the class of the number.
I want simple way to examine the number exactness.
I propose to introduce Numeric#exact? and/or Numeric#inexact? for resolving this inconvenience.
--
http://redmine.ruby-lang.org
next prev parent reply other threads:[~2011-10-31 13:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-14 4:20 [ruby-core:39539] [Ruby 1.9 - Feature #5321][Open] Introducing Numeric#exact? and Numeric#inexact? Kenta Murata
2011-10-29 22:09 ` [ruby-core:40514] [ruby-trunk - Feature #5321] " Alexey Muranov
2011-10-29 23:57 ` [ruby-core:40519] " Charles Nutter
2011-10-30 12:29 ` [ruby-core:40524] " Alexey Muranov
2011-10-31 11:04 ` [ruby-core:40553] " Alex Young
2011-10-31 12:13 ` [ruby-core:40555] [ruby-trunk - Feature #5321][Assigned] " Yusuke Endoh
2011-10-31 12:55 ` Yusuke Endoh [this message]
2011-10-31 13:21 ` [ruby-core:40557] [ruby-trunk - Feature #5321] " Alexey Muranov
2011-10-31 13:32 ` [ruby-core:40558] " Kenta Murata
2011-10-31 13:54 ` [ruby-core:40559] " tadayoshi funaba
2011-10-31 14:34 ` [ruby-core:40565] " Yusuke Endoh
2011-10-31 13:55 ` [ruby-core:40560] " Kenta Murata
2011-10-31 14:24 ` [ruby-core:40563] " Yusuke Endoh
2011-10-31 14:13 ` [ruby-core:40561] " Alexey Muranov
2011-10-31 14:54 ` [ruby-core:40566] " Kenta Murata
2011-10-31 14:59 ` [ruby-core:40567] " tadayoshi funaba
2011-10-31 15:32 ` [ruby-core:40570] " Alexey Muranov
2011-11-01 12:14 ` [ruby-core:40622] [ruby-trunk - Feature #5321][Assigned] " Masaya Tarui
2012-11-20 11:55 ` [ruby-core:49681] [ruby-trunk - Feature #5321] " mame (Yusuke Endoh)
2019-08-01 1:02 ` [ruby-core:94087] [Ruby master Feature#5321] " merch-redmine
2020-01-04 6:27 ` [ruby-core:96652] " wishdev
2020-01-15 2:23 ` [ruby-core:96861] " akr
2020-01-15 2:43 ` [ruby-core:96863] " sawadatsuyoshi
2020-01-15 3:03 ` [ruby-core:96864] " akr
2020-01-15 6:19 ` [ruby-core:96868] " sawadatsuyoshi
2020-01-16 8:04 ` [ruby-core:96899] " matz
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