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pub fn pymod(a: isize, b: isize) -> isize {
let r = a % b;
// If r and b differ in sign, add b to wrap the result to the correct sign.
if (r > 0 && b < 0) || (r < 0 && b > 0) {
return r + b;
}
r
}
pub fn is_some_and_not_empty<T>(v: &Option<Vec<T>>) -> bool {
match v {
Some(v) => !v.is_empty(),
None => false,
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn python_mod(){
assert_eq!(pymod(2, -3), -1);
assert_eq!(pymod(-2, 3), 1);
assert_eq!(pymod(-2, -3), -2);
assert_eq!(pymod(-3, -3), 0);
assert_eq!(pymod(3, 3), 0);
assert_eq!(pymod(2, 3), 2);
assert_eq!(pymod(4, 3), 1);
assert_eq!(pymod(3, 3), 0);
assert_eq!(pymod(6, 3), 0);
assert_eq!(pymod(-6, 3), 0);
assert_eq!(pymod(-6, -3), 0);
assert_eq!(pymod(6, -3), 0);
}
}
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