RegexOne - Learn Regular Expressions - Lesson 1: An Introduction, and the ABCsRegular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents. And while there is a lot of theory behind formal languages, the following lessons and examples will explore the more practical uses of regular expressions so that you can use them as quickly as possible. The first thing to recognize when using regular expressions i
Rubular: a Ruby regular expression editor and tester
