Solution: Count digits
examples/arrays/count-digits/src/main.rs
fn main() { let digits = [1, 2, 1, 3, 4, 5, 6, 7, 8, 8, 4, 3, 9, 7, 8, 5, 2, 3, 3, 2, 2, 4, 2, 4, 2, 1]; let mut counter = [0i8; 10]; for ch in digits { counter[ch] += 1; } for (ix, count) in counter.iter().enumerate() { println!("{ix}: {}", count); } }
0: 0 1: 3 2: 6 3: 4 4: 4 5: 2 6: 1 7: 2 8: 3 9: 1