Regular Expressions / Regular Expressions Advanced
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This coding exercise comes from Upcase, the online learning platform we run. It's part of the Regular Expressions course and is just one small sample of all the great material available on Upcase, so be sure to visit and check out the rest.
Grouping is one of the most powerful aspects of regular expressions - it lets you match portions of the string and refer to them later, instead of having one big match.
In this problem, you'll be reformatting phone numbers into a standard format.
Rubular is a fantastic website for getting quick feedback about your regex.
To start, you'll want to clone and run the setup script for the repo
git clone email@example.com:thoughtbot-upcase-exercises/regular-expressions-advanced.git cd regular-expressions-advanced bin/setup
bin/setup, then run
rake to see the failing tests.
Make the tests pass one by one.
You can run
rake at any point to re-run the tests.
If you find yourself stuck, be sure to check out the associated Upcase Forum discussion for this exercise to see what other folks have said.
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This exercise is maintained and funded by thoughtbot, inc.
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