Trait Map

pub trait Map<S: Scope, D: Data> {
    // Required methods
    fn map_in_place<L: FnMut(&mut D) + 'static>(&self, logic: L) -> Stream<S, D>;
    fn flat_map<I: IntoIterator, L: FnMut(D) -> I + 'static>(
        &self,
        logic: L,
    ) -> Stream<S, I::Item>
       where I::Item: Data;

    // Provided method
    fn map<D2: Data, L: FnMut(D) -> D2 + 'static>(
        &self,
        logic: L,
    ) -> Stream<S, D2> { ... }
}

Extension trait for Stream.

Required Methods

fn map_in_place<L: FnMut(&mut D) + 'static>(&self, logic: L) -> Stream<S, D>

Updates each element of the stream and yields the element, re-using memory where possible.

Examples

use timely::dataflow::operators::{ToStream, Map, Inspect};

timely::example(|scope| {
    (0..10).to_stream(scope)
           .map_in_place(|x| *x += 1)
           .inspect(|x| println!("seen: {:?}", x));
});

fn flat_map<I: IntoIterator, L: FnMut(D) -> I + 'static>( &self, logic: L, ) -> Stream<S, I::Item>

where I::Item: Data,

Consumes each element of the stream and yields some number of new elements.

Examples

use timely::dataflow::operators::{ToStream, Map, Inspect};

timely::example(|scope| {
    (0..10).to_stream(scope)
           .flat_map(|x| (0..x))
           .inspect(|x| println!("seen: {:?}", x));
});

Provided Methods

fn map<D2: Data, L: FnMut(D) -> D2 + 'static>(&self, logic: L) -> Stream<S, D2>

Consumes each element of the stream and yields a new element.

Examples

use timely::dataflow::operators::{ToStream, Map, Inspect};

timely::example(|scope| {
    (0..10).to_stream(scope)
           .map(|x| x + 1)
           .inspect(|x| println!("seen: {:?}", x));
});

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<S: Scope, D: Data> Map<S, D> for Stream<S, D>