RegExr
regular expressions 101
rubular
Expresso
i Hate Regex
RegEx Generator
RegexPlanet Ruby
Regex Crossword
Writefull
Grammarly
LanguageTool
Editsaurus
ProWritingAid
Wordtune
Gramlee.com
Grammarian PRO3
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Use online regex testers: Tools like Regex101 or RegExr can help visualize how your regex matches against test strings, providing explanations and highlighting potential issues. - Source: dev.to / 1 day ago
When thinking about how I might compare an arrangement to the contiguous group of damaged springs, I used regexr.com to experiment with very specific regexs that used the numbers. - Source: dev.to / 4 months ago
There are plenty of online regex tools to test and experiment with regex patterns. Some popular ones include RegExr, RegEx101, and RegexPlanet. - Source: dev.to / 5 months ago
Using regexr.com it at least appears to work as expected. - Source: dev.to / 5 months ago
If you are going to use RE's, use something like https://regexr.com/ to double check that they're doing what you want. I was suspicious of your 'cols = re.findall(r'\d+ .....', i)' line, and indeed it does miss some columns. You should rethink your column detection, and either not use REs or learn how to use capture groups and \w. There would then be no reason to use yet another RE in your column iterator to... Source: 5 months ago
regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
Grammarly - Clear, effective, mistake-free writing everywhere you type.
rubular - A ruby based regular expression editor
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Expresso - The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.
Editsaurus - Highlights potential pitfalls in your writing to encourage good habits.