# Regex

The goal of this book is to teach Regexes or if you wish Regular Expressions as they can be used in Rust with the [regex crate](https://crates.io/crates/regex).

The use of Regular expressions is also called "pattern matching" which might be confusing.

* [docs](https://docs.rs/regex/latest/regex/)
* [gitHub](https://github.com/rust-lang/regex)

## TODO

* Match a single digit `[0-9]` or also the non 0-9 digits?
* Match the first number.
* Match all the numbers.
* Parse this: `/* core */  some 1 text /* rust */  some 2 text /* perl */ some 3 text`.
* The characters used in regexes.
* ...


