https://regexr.com/5mhou RegExr: Learn, Build, & Test RegEx RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). regexr.com https://github.com/dream-ellie/regex GitHub - dream-ellie/regex Contribute to dream-ellie/regex development by creating an account on GitHub. github.com https://regexone.com/