Created
October 25, 2017 20:48
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Fizzbuzz in Rust
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#![feature(generators)] | |
#![feature(generator_trait)] | |
use std::ops::{Generator, GeneratorState}; | |
fn fizzbuzz_println(upto: u64) { | |
for i in 0..upto { | |
if i % 3 == 0 && i % 5 == 0 { | |
println!("FizzBuzz"); | |
} else if i % 3 == 0 { | |
println!("Fizz"); | |
} else if i % 5 == 0 { | |
println!("Buzz"); | |
} else { | |
println!("{}", i); | |
} | |
} | |
} | |
fn fizzbuzz_ifelse(upto: u64) -> Vec<String> { | |
let mut result: Vec<String> = Vec::new(); | |
for i in 0..upto { | |
if i % 3 == 0 && i % 5 == 0 { | |
result.push("FizzBuzz".into()); | |
} else if i % 3 == 0 { | |
result.push("Fizz".into()); | |
} else if i % 5 == 0 { | |
result.push("Buzz".into()); | |
} else { | |
result.push(i.to_string()); | |
} | |
} | |
result | |
} | |
fn fizzbuzz_vec(upto: u64) -> Vec<String> { | |
let mut result: Vec<String> = Vec::new(); | |
for i in 0..upto { | |
result.push(match (i % 3, i % 5) { | |
(0, 0) => "FizzBuzz".into(), | |
(0, _) => "Fizz".into(), | |
(_, 0) => "Buzz".into(), | |
(_, _) => i.to_string(), | |
}) | |
} | |
result | |
} | |
fn main() { | |
let fizzbuzz = |upto: u64| { | |
move || for i in 0..upto { | |
yield match (i % 3, i % 5) { | |
(0, 0) => "FizzBuzz".into(), | |
(0, _) => "Fizz".into(), | |
(_, 0) => "Buzz".into(), | |
(_, _) => i.to_string(), | |
} | |
} | |
}; | |
let mut output = fizzbuzz(100); | |
loop { | |
match output.resume() { | |
GeneratorState::Yielded(x) => println!("{}", x), | |
GeneratorState::Complete(()) => break, | |
} | |
} | |
} |
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