#  Regular Expressions: You are the master of your (massive) text 

 



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There are a few apps that provide cheat sheets and expression exercises. Here are a couple of them.

[https://play.google.com/store/apps/details?id=com.andkorsh.regexpal&hl=en\_US](https://play.google.com/store/apps/details?id=com.andkorsh.regexpal&hl=en_US)

<https://regexr.com/>

[https://play.google.com/store/apps/details?id=spencerstudios.com.regexapp&amp;hl=en\_US](https://play.google.com/store/apps/details?id=spencerstudios.com.regexapp&hl=en_US)