Great blog post.. First time I've been sold on Rust, sounds like it's got some great features. Maybe I just had to hear about it from a Ruby dev. :) Typos in

Great blog post.. First time I've been sold on Rust, sounds like it's got some great features. Maybe I just had to hear about it from a Ruby dev. :) Typos in the article: "slimed down", "you code could" Is "needle_length = needle.length" actually necessary? I thought repeated calls would be zero cost, but I'm guessing I'm wrong.