Trait differential_dataflow::operators::group::Count

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

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.

Implementors

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