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RegExr.com is an online tool to learn, build, and test Regular Expressions.

GitLab
BitBucket
VS Code
Git
CodePen
Node.js
Stack Overflow
Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
Which is more popular?
Based on our record, GitHub should be more popular than RegExr. It has been mentioned 2489 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | regexr.com | github.com |
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| Company | Startup from the United States | Startup from the United States · 500 - 999 employees · 2008 |
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GitHub is an essential platform for modern software development. It makes it easy to host, manage, and collaborate on code while providing powerful tools for version control, project management, and team...
GitHub Discussions is a communication forum for the community around an open source or internal project. Discussions enable fluid, open conversation in a public forum. Discussions are transparent and accessible, but...
However, like any (human) product, the platform has its limits, downsides, and critics. GitHub has been barred by certain governments, and even if that isn’t exactly the company’s fault, the users are the ones limited...
Recommendations tracked on public social media and blogs since March 2021.


Use Online Tools: There are many online regex testers and visualizers that can help you see how your patterns match against sample text. These tools often provide explanations for each part of the regex. I personally use... - Source: dev.to / over 1 year ago
However - here it becomes weird - when testing the original regex rule (the first one, without the \u00A0 part) on the same string in an interactive visualiser (https://regexr.com/ for instance), there is a match:. - Source: dev.to / almost 2 years ago
Learned regex in the 90's from the Perl documentation, or possibly one of the oreilly perl references. That was a time where printed language references were more convenient than searching the internet. Perl still includes a shell... - Source: Hacker News / about 2 years ago
On: push: branches: [tmp-recover] Jobs: recover: runs-on: ubuntu-latest # environment: production # needed for environment-level secrets steps: - run: | sudo apt-get update -qq && sudo apt-get... - Source: dev.to / 1 day ago
By integrating the Hindsight GitHub Repository directly into the agent’s execution loop, the framework automatically maintains a chronological, structured memory graph. The architecture splits the workflow into two distinct runtime loops:. - Source: dev.to / 1 day ago
Github hosts the open source server and client libraries. Github actions are used to build and deploy many of the various packages. There is also a private Github repository holding all the Cloudflare integrations. - Source: dev.to / 2 days ago
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Create, review and deploy code together with GitLab open source git repo management software | GitLab
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Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
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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.
Compare Expresso to RegExr or GitHub:

Build and debug modern web and cloud applications, by Microsoft
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