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Oct 23rd, 2019
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  1. fn main() {
  2. let input = 1234567890;
  3. let result: Vec<i32> = (0..=(input as f32).log10() as i32)
  4. .rev()
  5. .map(|n| input / 10f32.powi(n) as i32 % 10)
  6. .collect();
  7. println!("{:?}", result);
  8.  
  9. let mut result: Vec<i32> = std::iter::repeat(())
  10. .scan(input, |state, _| {
  11. let v = *state;
  12. *state /= 10;
  13. match v {0=>None, x => Some(x % 10)}
  14. })
  15. .collect();
  16. result.reverse();
  17. println!("{:?}", result);
  18. }
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