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Activity for --Hyde‭

Type On... Excerpt Status Date
Comment Post #291538 Got it. Thanks for your patience.
(more)
7 months ago
Edit Post #291538 Post edited:
7 months ago
Edit Post #291542 Initial revision 7 months ago
Answer A: The 50 substrings that validate any string of Roman numerals
Google Sheets, 155 bytes ``` =regexextract(A1,"CCCC|CC[DM]|CM[CDM]|DC[DM]|DD|DM|I[CDLM]|IIII|II[VX]|IVI|IX[CILVX]|L[CDLM]|LX[CL]|MMMM|V[CDLMVX]|VI[VX]|XCC[DLMX]|XD|XLX|XM|XX[CL]|XXXX") ``` The same regex as in my JavaScript answer. Returns an error on valid strings.
(more)
7 months ago
Edit Post #291538 Post edited:
move Google Sheets formula to its own answer
7 months ago
Comment Post #291538 @#53890 thanks, but I don't really see the point, because the same pattern can be used as is in most any regex capable language. I wanted to show the Google Sheets formula because it uses `regexextract()` instead of the `regexmatch()` as one's knee-jerk approach would often be. First time here so I d...
(more)
7 months ago
Edit Post #291538 Initial revision 7 months ago
Answer A: The 50 substrings that validate any string of Roman numerals
JavaScript, 149 bytes ``` t=>t.match(/CCCC|CC[DM]|CM[CDM]|DC[DM]|DD|DM|I[CDLM]|IIII|II[VX]|IVI|IX[CILVX]|L[CDLM]|LX[CL]|MMMM|V[CDLMVX]|VI[VX]|XCC[DLMX]|XD|XLX|XM|XX[CL]|XXXX/) ``` Simple regex. Returns `null` on valid strings. Try it online!
(more)
7 months ago