
regular expressions 101
RegExr
Regex Crossword
Regexper
i Hate Regex
RegexBuddy
rubular
RegexOne offers learning regular expressions with simple, interactive examples.

replit
StackBlitz
CloudShell
vscode.dev
CodeTasty
AWS Cloud9
Gitpod
GItHub Codespaces is a hosted remote coding environment by GitHub based on Visual Studio Codespaces integrated directly for GitHub.
Which is more popular?
Based on our record, GitHub Codespaces should be more popular than RegexOne. It has been mentioned 152 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Overall verdict
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Beginners who want to try their luck can use GitHub Codespaces for free with limited benefits, but you will have enough features to carry on. If you are a team or an enterprise, you can start using GitHub Codespaces...
Recommendations tracked on public social media and blogs since March 2021.


I spent half a day playing with https://regexone.com and got the fundamentals in place, after that it’s been practice in solving tasks at work. Rubular is awesome if you’re looking to test out a pattern. - Source: Hacker News / about 2 years ago
Start with https://regexone.com/ fun puzzle style interactive tutorial to grasp the basics. After that it's the matter of either it using it with your CLI tools or applying it to problems you are working on. - Source: Hacker News / about 2 years ago
RegexOne - Learn Regular Expressions -- will get you thru the basics (i.e., more than most people know) with interactive practice which is probably the best way. HTB probably does the hands on approach, too. Anyhow, RegexOne makes it... Source: almost 3 years ago
First, remote dev environments became table stakes. GitHub Codespaces, Gitpod, and self-hosted dev containers became how serious teams worked. Every engineer I know who ships to production now SSHs into a box they didn't provision, edits... - Source: dev.to / 5 months ago
This package provides support for managing GitHub Codespaces in Emacs and connecting to them via TRAMP. It provides a handy completing-read UI that lets you choose from all your created codespaces. - Source: dev.to / 7 months ago
GitHub Codespaces provides 60 hours of free compute time every month, which is more than enough for scoped home assignments or interviews. It’s a full VSCode in the browser at github.dev or vscode.dev. - Source: dev.to / 10 months ago
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Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
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Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
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RegExr.com is an online tool to learn, build, and test Regular Expressions.
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Online VS Code Editor for Angular and React
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Welcome to the fantastic world of nerdy regex fun!
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Cloud Shell is a free admin machine with browser-based command-line access for managing your infrastructure and applications on Google Cloud Platform.
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