Related tip: If you click the arrow that appears when hovering over any of the example code in the Rust book [1] or other Rust documentation, it will open the e

Related tip: If you click the arrow that appears when hovering over any of the example code in the Rust book [1] or other Rust documentation, it will open the example in the playpen. [1]: http://doc.rust-lang.org/book/ http://doc.rust-lang.org/book/