[#100689] [Ruby master Feature#17303] Make webrick to bundled gems or remove from stdlib — hsbt@...
Issue #17303 has been reported by hsbt (Hiroshi SHIBATA).
11 messages
2020/11/02
[#100852] [Ruby master Feature#17326] Add Kernel#must! to the standard library — zimmerman.jake@...
Issue #17326 has been reported by jez (Jake Zimmerman).
24 messages
2020/11/14
[#100930] [Ruby master Feature#17333] Enumerable#many? — masafumi.o1988@...
Issue #17333 has been reported by okuramasafumi (Masafumi OKURA).
10 messages
2020/11/18
[#101071] [Ruby master Feature#17342] Hash#fetch_set — hunter_spawn@...
Issue #17342 has been reported by MaxLap (Maxime Lapointe).
26 messages
2020/11/25
[ruby-core:100831] [Ruby master Bug#17318] Raising float to the power of other issue
From:
manojmishra.deb@...
Date:
2020-11-13 15:43:54 UTC
List:
ruby-core #100831
Issue #17318 has been updated by deXterbed (Manoj Mishra). mame (Yusuke Endoh) wrote in #note-2: > It is due to precedence of operators unary minus and `**`. > > `x**y` calculates `(-0.4790529833050308)**0.9918032786885246`, and `-0.4790529833050308**0.9918032786885246` calculates `-(0.4790529833050308**0.9918032786885246)`. > > ``` > irb(main):001:0> -(0.4790529833050308**0.9918032786885246) > => -0.4819515219418196 > irb(main):002:0> (-0.4790529833050308)**0.9918032786885246 > => (-0.48179173935576963+0.012409246172848266i) > ``` Thanks for the explanation Yusuke Endoh, that still raises the question, how exactly am i supposed to calculate x**y without ending up with a complex number? x and y are dynamic values, i can't use parentheses to force precedence. ---------------------------------------- Bug #17318: Raising float to the power of other issue https://bugs.ruby-lang.org/issues/17318#change-88472 * Author: deXterbed (Manoj Mishra) * Status: Rejected * Priority: Normal * ruby -v: 2.6.3 * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- Raising a negative float to another float results in a complex number. Interestingly, doing the same thing without using variables works fine! Sample Snippet: $ irb 2.6.3 :001 > x=-0.4790529833050308 => -0.4790529833050308 2.6.3 :002 > y=0.9918032786885246 => 0.9918032786885246 2.6.3 :003 > x**y => (-0.48179173935576963+0.012409246172848264i) 2.6.3 :004 > -0.4790529833050308**0.9918032786885246 => -0.4819515219418196 -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>