https://github.com/wibeasley/class-regex-2015

material for our regex class
https://github.com/wibeasley/class-regex-2015

Last synced: 30 days ago
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material for our regex class

• Host: GitHub
• URL: https://github.com/wibeasley/class-regex-2015
• Owner: wibeasley
• License: mit
• Created: 2015-12-03T04:05:02.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2016-03-28T20:26:52.000Z (almost 9 years ago)
• Last Synced: 2024-12-18T01:21:35.937Z (about 1 month ago)
• Language: R
• Size: 219 KB
• Stars: 1
• Watchers: 5
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# regex-class-2015

material for our regex class

## Useful resources

- [Regular Expressions Cookbook, 2nd Edition](http://shop.oreilly.com/product/0636920023630.do) (O'Reilly, 2012) by Jan Goyvaerts, Steven Levithan (Our class's primary text)

- Lectures by [Software Carpentry](http://swcarpentry.github.io/v4/regexp/index.html). Great breaking into regexes, with plenty of examples.

- https://regex101.com/#pcre.  Notice it uses PCRE (which is the same regex engine that R uses), and the substitution syntax is pretty close to R’s.  (Remember that R needs an extra ’\’ to escape the regex’s ‘\’.  But this tool doesn’t.)

    Make sure you add a ‘g’ in the options box.  This won’t exactly correspond to each line being its own separate element in R, but it’s close.  However now these four characters/expressions behave differently: `^`, `$`, `\A`, and `\Z`.

    

    Also notice that the ‘Explanation’ and ‘Match Information’ windows give great diagnostic information as you’re building it.