Timeline for Is this number a factorial?

Current License: CC BY-SA 4.0

47 events

when toggle format	what	by	license	comment
Mar 28, 2021 at 23:26	history	edited	Deadcode	CC BY-SA 4.0	Update TIOs to have no-newline end
Mar 25, 2021 at 0:07	history	edited	Deadcode	CC BY-SA 4.0	I realized that when used inside a loop, molecular lookahead may be able to do things that are impossible with variable-length lookbehind, because the rollback done by a lookbehind has to be popped out of before going to the next iteration.
Mar 18, 2021 at 23:12	history	edited	Deadcode	CC BY-SA 4.0	added 4 characters in body
Mar 18, 2021 at 23:03	history	edited	Deadcode	CC BY-SA 4.0	Add 92 byte regex adapted into a 99 byte return inverse factorial regex with molecular lookahead + reset start
Mar 18, 2021 at 22:24	history	edited	Deadcode	CC BY-SA 4.0	Add 92 byte regex adapted into a 103 byte molecular lookahead return inverse factorial regex
Mar 18, 2021 at 20:27	history	edited	Deadcode	CC BY-SA 4.0	edited body
Mar 18, 2021 at 20:22	history	edited	Deadcode	CC BY-SA 4.0	Add molecular lookahead version of return inverse factorial
Mar 18, 2021 at 20:04	history	edited	Deadcode	CC BY-SA 4.0	Demonstrate that the 96 byte version returns the inverse factorial minus 1 in a capture group, and edit "accident" -> "coincidence"
Mar 18, 2021 at 19:41	history	edited	Deadcode	CC BY-SA 4.0	Improve literal accuracy of the comments for the inverse factorial optimized version
Mar 18, 2021 at 12:39	history	edited	Deadcode	CC BY-SA 4.0	-3 bytes on return inverse factorial version
Mar 18, 2021 at 11:57	history	edited	Deadcode	CC BY-SA 4.0	Optimize the ECMAScript + \K version of the inverse factorial optimized regex
Mar 18, 2021 at 11:46	history	edited	Deadcode	CC BY-SA 4.0	Add comparable ECMAScript + \K version (without the minus 1)
Mar 18, 2021 at 11:40	history	edited	Deadcode	CC BY-SA 4.0	Add a version optimized for returning the inverse factorial as a match
Mar 18, 2021 at 4:19	history	edited	Deadcode	CC BY-SA 4.0	-1 byte on "Return inverse factorial or no-match, in ECMAScript + \K"
Mar 18, 2021 at 4:11	history	edited	Deadcode	CC BY-SA 4.0	-2 bytes on "Return inverse factorial or no-match, in ECMAScript + \K"
Mar 18, 2021 at 3:54	history	edited	Deadcode	CC BY-SA 4.0	Optimize the plain ECMAScript version of "Return inverse factorial or no-match" from 112 → 109 bytes
Mar 18, 2021 at 3:48	history	edited	Deadcode	CC BY-SA 4.0	Oops, had updated the "Return inverse factorial or no-match" TIO but not its plain markdown
Mar 14, 2021 at 18:35	history	edited	Deadcode	CC BY-SA 4.0	Edit the explanation paragraph to be up-to-date with the 92 byte regex
Mar 13, 2021 at 12:16	history	edited	Deadcode	CC BY-SA 4.0	Move the -n byte attributions to the top for visibility
Mar 13, 2021 at 12:09	history	edited	Deadcode	CC BY-SA 4.0	edited body
Mar 13, 2021 at 12:03	history	edited	Deadcode	CC BY-SA 4.0	Grimy → Grimmy
Mar 13, 2021 at 11:58	history	edited	Deadcode	CC BY-SA 4.0	Use an atom ⚛ symbol to denote solutions that used non-atomic lookahead
Mar 13, 2021 at 9:02	history	edited	Deadcode	CC BY-SA 4.0	-26 bytes thanks to Grimy in collaboration with H.PWiz
Mar 13, 2021 at 7:38	history	edited	Deadcode	CC BY-SA 4.0	this should have been done in the previous edit
Feb 21, 2019 at 7:15	history	edited	Deadcode	CC BY-SA 4.0	Drop 1 byte thanks to a trick found by Grimy
Feb 21, 2019 at 7:00	history	edited	Deadcode	CC BY-SA 4.0	In the length history, don't include the overhead used to return inverse factorial (i.e. just show the length a true/false version would have)
Feb 5, 2019 at 20:42	history	edited	Deadcode	CC BY-SA 4.0	Golf down the C# (.NET) TIO a bit
Feb 5, 2019 at 19:24	history	edited	Deadcode	CC BY-SA 4.0	Clarify the exponential-slowdown version and its TIO link
Feb 5, 2019 at 12:17	history	edited	Deadcode	CC BY-SA 4.0	Enable ECMAScript emulation mode in the .NET TIO link
Feb 5, 2019 at 11:02	history	edited	Deadcode	CC BY-SA 4.0	Replace slow Retina TIO with much faster C# (.NET) + RegexOptions.Compiled
Feb 4, 2019 at 0:35	history	edited	Deadcode	CC BY-SA 4.0	Replace Retina TIO code with much faster JavaScript; add note about slow-version not working in ECMAScript
Jan 26, 2019 at 2:25	history	edited	Deadcode	CC BY-SA 4.0	Use the more compact form of the language name
Jan 26, 2019 at 2:04	history	edited	Deadcode	CC BY-SA 4.0	one TIO link was next to the wrong version of the regex
Jan 25, 2019 at 7:40	history	edited	Deadcode	CC BY-SA 4.0	Show the exponential-slowdown byte count prominently
Jan 25, 2019 at 6:24	history	edited	Deadcode	CC BY-SA 4.0	Add note about exponential slowdown golf optimization
Jan 24, 2019 at 18:43	history	edited	Deadcode	CC BY-SA 4.0	Put the explanation of generalized division in a spoiler tag
Jan 23, 2019 at 20:12	history	edited	Deadcode	CC BY-SA 4.0	Optimize the "Try it online" Retina code
Jan 23, 2019 at 4:39	history	edited	Deadcode	CC BY-SA 4.0	Replace "Try it online" links with ones that support and use ranges
Jan 22, 2019 at 23:17	history	edited	Deadcode	CC BY-SA 4.0	Replace "Try it online" link with one in which the code box contains only the regex
Jan 22, 2019 at 22:48	history	edited	Deadcode	CC BY-SA 4.0	Use a much better Retina program to show the return values of the 125 byte regex
Jan 22, 2019 at 11:00	history	edited	Deadcode	CC BY-SA 4.0	Provide a "Try it online" link for the index-returning version
Jan 22, 2019 at 4:41	history	edited	Deadcode	CC BY-SA 4.0	Delineate the different versions of the regex more clearly
Jan 22, 2019 at 4:33	history	edited	Deadcode	CC BY-SA 4.0	Returning the inverse factorial isn't part of the required task here, so, 125 → 119 bytes
Jan 22, 2019 at 4:20	history	edited	Deadcode	CC BY-SA 4.0	deleted 26 characters in body
Jan 22, 2019 at 4:14	history	edited	Deadcode	CC BY-SA 4.0	added 8 characters in body
Jan 22, 2019 at 4:07	history	edited	Deadcode	CC BY-SA 4.0	deleted 5 characters in body
Jan 22, 2019 at 4:01	history	answered	Deadcode	CC BY-SA 4.0

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