Takes a number like 234908571 and returns the digits it contains as a Vec<u8>: [2, 3, 4, 9, 0, 8, 5, 7, 1]

digitize.rs

fn digitize(n: u64) -> Vec<u8> {
	let mut places = 0;
	let mut ndiv = n;
	while ndiv > 0 {
		ndiv /= 10;
		places += 1;
	}

	let mut digits = Vec::new();

	let mut nsub = n;
	for i in (0..places) {
		let p = places-i-1;
		let base = num::pow(10, p);
		let mut digit = 0;
		while nsub >= base {
			nsub -= base;
			digit += 1;
		}

		digits.push(digit);
	}

	digits
}