For those who prefer a more in-depth introduction than a blog post: Jeffrey Friedl's "Mastering Regular Expression"[1] covers the theory as well while still bei

For those who prefer a more in-depth introduction than a blog post: Jeffrey Friedl's "Mastering Regular Expression"[1] covers the theory as well while still being very pleasant to read (I only know the first edition, apparently there are more recent ones). [1] http://shop.oreilly.com/product/9781565922570.do http://shop.oreilly.com/product/9781565922570.do