Trait ReduceLeft
parze::reduce
pub trait ReduceLeft<T, U> { fn reduce_left(self, f: impl Fn(U, T) -> T) -> T; }
fn reduce_left(self, f: impl Fn(U, T) -> T) -> T
impl<T, U, I: IntoIterator<Item = U>> ReduceLeft<T, U> for (I, T)