Struct ZipOp

pub struct ZipOp<A, B> { /* private fields */ }

An Observable that combines from two other two Observables.

This struct is created by the zip method on Observable. See its documentation for more.

Trait Implementations

impl<A: Clone, B: Clone> Clone for ZipOp<A, B>

fn clone(&self) -> ZipOp<A, B>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, A, B> LocalObservable<'a> for ZipOp<A, B>

where A: LocalObservable<'a>, B: LocalObservable<'a, Err = A::Err>, A::Item: 'a, B::Item: 'a,

type Unsub = LocalSubscription

fn actual_subscribe<O: Observer<Item = Self::Item, Err = Self::Err> + 'a>( self, subscriber: Subscriber<O, LocalSubscription>, ) -> Self::Unsub

impl<A, B> Observable for ZipOp<A, B>

where A: Observable, B: Observable<Err = A::Err>,

type Item = (<A as Observable>::Item, <B as Observable>::Item)

type Err = <A as Observable>::Err

fn first(self) -> TakeOp<Self>

emit only the first item emitted by an Observable

fn first_or(self, default: Self::Item) -> DefaultIfEmptyOp<TakeOp<Self>>

emit only the first item emitted by an Observable

fn last_or( self, default: Self::Item, ) -> DefaultIfEmptyOp<LastOp<Self, Self::Item>>

Emit only the last final item emitted by a source observable or a default item given.

fn element_at(self, nth: u32) -> TakeOp<SkipOp<Self>>

Emit only item n (0-indexed) emitted by an Observable

fn ignore_elements(self) -> FilterOp<Self, fn(&Self::Item) -> bool>

Do not emit any items from an Observable but mirror its termination notification

fn all<F>( self, pred: F, ) -> DefaultIfEmptyOp<TakeOp<FilterOp<MapOp<Self, F>, fn(&bool) -> bool>>>

where F: Fn(Self::Item) -> bool,

Determine whether all items emitted by an Observable meet some criteria

fn contains(self, target: Self::Item) -> ContainsOp<Self, Self::Item>

Determine whether an Observable emits a particular item or not

fn last(self) -> LastOp<Self, Self::Item>

Emits only last final item emitted by a source observable.

fn finalize<F>(self, f: F) -> FinalizeOp<Self, F>

where F: FnMut(),

Call a function when observable completes, errors or is unsubscribed from.

fn flatten<Inner, A>(self) -> FlattenOp<Self, Inner>

where Inner: Observable<Item = A, Err = Self::Err>,

Creates an Observable that combines all the emissions from Observables that get emitted from an Observable.

fn flat_map<Inner, B, F>(self, f: F) -> FlatMapOp<Self, Inner, F>

where Inner: Observable<Item = B, Err = Self::Err>, F: Fn(Self::Item) -> Inner,

Applies given function to each item emitted by this Observable, where that function returns an Observable that itself emits items. It then merges the emissions of these resulting Observables, emitting these merged results as its own sequence.

fn group_by<D, Item, Key>(self, discr: D) -> GroupByOp<Self, D>

where D: FnMut(&Item) -> Key,

Groups items emited by the source Observable into Observables. Each emited Observable emits items matching the key returned by the discriminator function.

fn map<B, F>(self, f: F) -> MapOp<Self, F>

where F: Fn(Self::Item) -> B,

Creates a new stream which calls a closure on each element and uses its return as the value.

fn map_to<B>(self, value: B) -> MapToOp<Self, B>

Maps emissions to a constant value.

fn merge<S>(self, o: S) -> MergeOp<Self, S>

where S: Observable<Item = Self::Item, Err = Self::Err>,

combine two Observables into one by merging their emissions

fn merge_all(self, concurrent: usize) -> MergeAllOp<Self>

Converts a higher-order Observable into a first-order Observable which concurrently delivers all values that are emitted on the inner Observables.

fn filter<F>(self, filter: F) -> FilterOp<Self, F>

where F: Fn(&Self::Item) -> bool,

Emit only those items from an Observable that pass a predicate test

fn filter_map<F, SourceItem, Item>(self, f: F) -> FilterMapOp<Self, F>

where F: FnMut(SourceItem) -> Option<Item>,

The closure must return an Option. filter_map creates an iterator which calls this closure on each element. If the closure returns Some(element), then that element is returned. If the closure returns None, it will try again, and call the closure on the next element, seeing if it will return Some.

fn box_it<O: IntoBox<Self>>(self) -> BoxOp<O>

where BoxOp<O>: Observable<Item = Self::Item, Err = Self::Err>,

box an observable to a safety object and convert it to a simple type BoxOp, which only care Item and Err Observable emitted.

fn skip(self, count: u32) -> SkipOp<Self>

Ignore the first count values emitted by the source Observable.

fn skip_while<F>(self, callback: F) -> SkipWhileOp<Self, F>

where F: FnMut(&Self::Item) -> bool,

Ignore values while result of a callback is true.

fn skip_last(self, count: usize) -> SkipLastOp<Self>

Ignore the last count values emitted by the source Observable.

fn take(self, count: u32) -> TakeOp<Self>

Emits only the first count values emitted by the source Observable.

fn take_until<T>(self, notifier: T) -> TakeUntilOp<Self, T>

Emits the values emitted by the source Observable until a notifier Observable emits a value.

fn take_while<F>(self, callback: F) -> TakeWhileOp<Self, F>

where F: FnMut(&Self::Item) -> bool,

Emits values while result of an callback is true.

fn take_last(self, count: usize) -> TakeLastOp<Self>

Emits only the last count values emitted by the source Observable.

fn sample<O>(self, sampling: O) -> SampleOp<Self, O>

where O: Observable,

Emits item it has most recently emitted since the previous sampling

fn scan_initial<OutputItem, BinaryOp>( self, initial_value: OutputItem, binary_op: BinaryOp, ) -> ScanOp<Self, BinaryOp, OutputItem>

where BinaryOp: Fn(OutputItem, Self::Item) -> OutputItem, OutputItem: Clone,

The Scan operator applies a function to the first item emitted by the source observable and then emits the result of that function as its own first emission. It also feeds the result of the function back into the function along with the second item emitted by the source observable in order to generate its second emission. It continues to feed back its own subsequent emissions along with the subsequent emissions from the source Observable in order to create the rest of its sequence.

fn scan<OutputItem, BinaryOp>( self, binary_op: BinaryOp, ) -> ScanOp<Self, BinaryOp, OutputItem>

where BinaryOp: Fn(OutputItem, Self::Item) -> OutputItem, OutputItem: Default + Clone,

Works like scan_initial but starts with a value defined by a Default trait for the first argument binary_op operator operates on.

fn reduce_initial<OutputItem, BinaryOp>( self, initial: OutputItem, binary_op: BinaryOp, ) -> ReduceOp<Self, BinaryOp, OutputItem>

where BinaryOp: Fn(OutputItem, Self::Item) -> OutputItem, OutputItem: Clone,

Apply a function to each item emitted by an observable, sequentially, and emit the final value, after source observable completes.

fn reduce<OutputItem, BinaryOp>( self, binary_op: BinaryOp, ) -> DefaultIfEmptyOp<LastOp<ScanOp<Self, BinaryOp, OutputItem>, OutputItem>>

where BinaryOp: Fn(OutputItem, Self::Item) -> OutputItem, OutputItem: Default + Clone,

Works like reduce_initial but starts with a value defined by a Default trait for the first argument f operator operates on.

fn max(self) -> MinMaxOp<Self, Self::Item>

where Self::Item: Clone + Send + PartialOrd<Self::Item>,

Emits the item from the source observable that had the maximum value.

fn min(self) -> MinMaxOp<Self, Self::Item>

where Self::Item: Clone + Send + PartialOrd<Self::Item>,

Emits the item from the source observable that had the minimum value.

fn sum(self) -> SumOp<Self, Self::Item>

where Self::Item: Clone + Default + Add<Self::Item, Output = Self::Item>,

Calculates the sum of numbers emitted by an source observable and emits this sum when source completes.

fn count(self) -> CountOp<Self, Self::Item>

Emits the number of items emitted by a source observable when this source completes.

fn average(self) -> AverageOp<Self, Self::Item>

where Self::Item: Clone + Send + Default + Add<Self::Item, Output = Self::Item> + Mul<f64, Output = Self::Item>,

Calculates the sum of numbers emitted by an source observable and emits this sum when source completes.

fn publish<Subject: Default>(self) -> ConnectableObservable<Self, Subject>

Returns a ConnectableObservable. A ConnectableObservable Observable resembles an ordinary Observable, except that it does not begin emitting items when it is subscribed to, but only when the Connect operator is applied to it. In this way you can wait for all intended observers to subscribe to the Observable before the Observable begins emitting items.

fn share<Subject, Inner>( self, ) -> RefCount<Inner, ConnectableObservable<Self, Subject>>

where Inner: RefCountCreator<Connectable = ConnectableObservable<Self, Subject>>, Subject: Default, Self: Clone,

Returns a new Observable that multicast (shares) the original Observable. As long as there is at least one Subscriber this Observable will be subscribed and emitting data. When all subscribers have unsubscribed it will unsubscribe from the source Observable. Because the Observable is multicasting it makes the stream hot. This is an alias for publish().ref_count()

fn delay<SD>(self, dur: Duration, scheduler: SD) -> DelayOp<Self, SD>

Delays the emission of items from the source Observable by a given timeout or until a given Instant.

fn delay_at<SD>(self, at: Instant, scheduler: SD) -> DelayOp<Self, SD>

fn subscribe_on<SD>(self, scheduler: SD) -> SubscribeOnOP<Self, SD>

Specify the Scheduler on which an Observable will operate

fn observe_on<SD>(self, scheduler: SD) -> ObserveOnOp<Self, SD>

Re-emits all notifications from source Observable with specified scheduler.

fn debounce<SD>(self, duration: Duration, scheduler: SD) -> DebounceOp<Self, SD>

Emits a value from the source Observable only after a particular time span has passed without another source emission.

fn throttle_time<SD>( self, duration: Duration, edge: ThrottleEdge, scheduler: SD, ) -> ThrottleTimeOp<Self, SD>

Emits a value from the source Observable, then ignores subsequent source values for duration milliseconds, then repeats this process.

fn distinct(self) -> DistinctOp<Self>

Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from previous items.

fn zip<U>(self, other: U) -> ZipOp<Self, U>

where U: Observable,

‘Zips up’ two observable into a single observable of pairs.

fn default_if_empty(self, default_value: Self::Item) -> DefaultIfEmptyOp<Self>

Emits default value if Observable completed with empty result

fn buffer_with_count(self, count: usize) -> BufferWithCountOp<Self>

Buffers emitted values of type T in a Vec and emits that Vec as soon as the buffer’s size equals the given count. On complete, if the buffer is not empty, it will be emitted. On error, the buffer will be discarded.

fn buffer_with_time<S>( self, time: Duration, scheduler: S, ) -> BufferWithTimeOp<Self, S>

Buffers emitted values of type T in a Vec and emits that Vec periodically.

fn buffer_with_count_and_time<S>( self, count: usize, time: Duration, scheduler: S, ) -> BufferWithCountOrTimerOp<Self, S>

Buffers emitted values of type T in a Vec and emits that Vec either if the buffer’s size equals count, or periodically. This operator combines the functionality of buffer_with_count and buffer_with_time.

impl<A, B> SharedObservable for ZipOp<A, B>

where A: SharedObservable, B: SharedObservable<Err = A::Err>, A::Item: Send + Sync + 'static, B::Item: Send + Sync + 'static, A::Unsub: Send + Sync, B::Unsub: Send + Sync,

type Unsub = SharedSubscription

fn actual_subscribe<O: Observer<Item = Self::Item, Err = Self::Err> + Sync + Send + 'static>( self, subscriber: Subscriber<O, SharedSubscription>, ) -> Self::Unsub

fn into_shared(self) -> Shared<Self>

where Self: Sized,

Convert to a thread-safe mode.