Convert u32 to the vec of bytes big-endian

u32_to_bytes.rs

fn int_to_bytes(num: u32) -> Vec<u8> {
	let mut bytes: Vec<u8> =
		(0..4).map(|offset| ((num >> offset * 8) & 0xFF) as u8).collect();
	bytes.reverse();
	bytes
}

fn main() {
	let res = int_to_bytes(1234u32);
	println!("{:?}", res);
}