For those who work with regex often, what are some of the approaches you found to learn regex effectively?

1

RegExr

Https://regexr.com/ is actually where I learned most of my regex - I usually just copy/paste a sample of whatever text I need to parse and play around with things until I have an expression that passes. All the other resources people have posted here are also great to become familiar with some of the common functionality you'll find yourself using.

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2

regular expressions 101

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3

Regex Crossword

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4

RegexPal

BUT - As far as resources for building out the regex patterns, I use regexpal.com and a copy of this https://cheatography.com/davechild/cheat-sheets/regular-expressions/pdf/ printed out beside me. Once you get into it, the power of subgroups, and lookahead/behind processing beats some of the mental gymnastics you would need to go to code it out in your language of choice.

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