Trait GroupBy 

pub trait GroupBy<K> {
    type ReturnOperand;

    // Required method
    fn group_by(&self, key: K) -> Self::ReturnOperand;
}

Required Associated Types

type ReturnOperand

Required Methods

fn group_by(&self, key: K) -> Self::ReturnOperand

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<O, K> GroupBy<K> for O

where O: Apply<GroupByOperation<K>>, GroupByOperation<K>: Operation,

type ReturnOperand = <O as Apply<GroupByOperation<K>>>::Output