Trait differential_dataflow::operators::group::Count

pub trait Count<G: Scope, K: Data> where
    G::Timestamp: Lattice, {
    fn count(&self) -> Collection<G, (K, Delta)>;
    fn count_u(&self) -> Collection<G, (K, Delta)>
    where
        K: Unsigned + Default;
}

Counts the number of occurrences of each element.

Required Methods

fn count(&self) -> Collection<G, (K, Delta)>

Counts the number of occurrences of each element.

fn count_u(&self) -> Collection<G, (K, Delta)> where
    K: Unsigned + Default, 

Counts the number of occurrences of each unsigned element.

Implementors

• impl<G: Scope, K: Data + Default> Count<G, K> for Collection<G, K> where
    K: Unsigned + Default,
    G::Timestamp: Lattice,