Recently I was asked where a novice would start learning how to read and write regular expressions. Below are two sites that I think would be useful.
Reading regular expressions
I think RegExr is a good site for explaining regular expressions.
Writing regular expressions
Learning to write regular expressions is quite hard. RegexOne provides a very good beginners tutorial to help people learn how to write regular expressions.
What resources have helped you to learn how to read/write regular expressions?
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