Rust 实例

Writing an (Overly) Idiomatic Fizzbuzz with Rust

看看这个教程，为 i32 数据类型添加 trait , 以及模式匹配的用法。

pub trait Fizzy {
    fn fizzy(&self) -> String;
}

impl Fizzy for i32 {
    fn fizzy(&self) -> String {
        match (self % 3, self % 5) {
            (0, 0) => String::from("FizzBuzz"),
            (0, _) => String::from("Fizz"),
            (_, 0) => String::from("Buzz"),
            _ => format!("{}", self),
        }
    }
}

fn main() {
    for x in 1..=100 {
        println!("{}", x.fizzy())
    }
}