XWStats is a great resource for advanced tracking of your own stats as well as comparisons to others. Go to a given puzzle's individual page to see the median solve time for that day - for example, the median solve time for Sunday 3/5 was 20:57. (Note that the site can only track times among those who have created XWStats accounts, which I imagine is a pretty dedicated group of crossword nerds, so the median solve... Source: over 1 year ago

I kind of doubt it, but XW stats does try to track this through user input. I suppose someone could try to train a model to compare new puzzles to ones in the database for an estimate of difficulty. Source: over 1 year ago

As a ruby developer, I was happy to find that VS Code / TextMate grammar files use the same regular expression engine called Oniguruma as ruby itself. Thus, I could be sure that when trying my regular expressions in my favorite online regex tool, rubular.com, there would be no inconsistencies due to the engine inner workings. - Source: dev.to / 7 months ago

In my testing on a couple of regex testers (https://rubular.com/ & https://regex101.com/) this seems to select the postcode correctly each time. Source: 12 months ago

Copied from Rubular ( a nice tool to test regexes ):. Source: over 1 year ago

To add on to this from a regex perspective - I find regex to be invaluable in my workflows. Once you learn the basics I always test and debug my strings using https://rubular.com because it has string hints at the bottom that are readily available. Source: over 1 year ago

Mostly trial and error using pythex.org for python, regextester.com for c/c++, or rubular.com if you're coding in ruby for some reason. Source: over 1 year ago