Have you met foo
before?
fn foo(n: usize, k: usize) -> usize {
match (n, k) {
(_, 0) => 1,
(0, _) => 0,
_ => foo(n-1, k-1) + foo(n-1, k)
}
}
I bet you have!
fn bar(x: f64, k: i32) -> f64 {
use std::cmp::Ordering::*;
match k.cmp(&0) {
Less => 0.,
Equal => 1.,
Greater => (0..k)
.map(|i|
(x - i as f64) /
(k - i) as f64
).product()
}
}
Solve problems without interruption
Have fun on the playground.