RxJava

rx.operators
Class OperationAny

java.lang.Object
  rx.operators.OperationAny

public final class OperationAny
extends java.lang.Object

Returns an Observable that emits true if any element of an observable sequence satisfies a condition, otherwise false.

Constructor Summary

OperationAny()

Method Summary

static <T> Observable.OnSubscribeFunc<java.lang.Boolean>	any(Observable<? extends T> source) Returns an Observable that emits true if the source Observable is not empty, otherwise false.
static <T> Observable.OnSubscribeFunc<java.lang.Boolean>	any(Observable<? extends T> source, Func1<? super T,java.lang.Boolean> predicate) Returns an Observable that emits true if any element of the source Observable satisfies the given condition, otherwise false.
static <T> Observable.OnSubscribeFunc<java.lang.Boolean>	exists(Observable<? extends T> source, Func1<? super T,java.lang.Boolean> predicate)
static <T> Observable.OnSubscribeFunc<java.lang.Boolean>	isEmpty(Observable<? extends T> source)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OperationAny

public OperationAny()

Method Detail

any

public static <T> Observable.OnSubscribeFunc<java.lang.Boolean> any(Observable<? extends T> source)

Returns an Observable that emits true if the source Observable is not empty, otherwise false.

Parameters:

source - The source Observable to check if not empty.

Returns:

A subscription function for creating the target Observable.

isEmpty

public static <T> Observable.OnSubscribeFunc<java.lang.Boolean> isEmpty(Observable<? extends T> source)

any

public static <T> Observable.OnSubscribeFunc<java.lang.Boolean> any(Observable<? extends T> source,
                                                                    Func1<? super T,java.lang.Boolean> predicate)

Returns an Observable that emits true if any element of the source Observable satisfies the given condition, otherwise false. Note: always emit false if the source Observable is empty.

Parameters:

source - The source Observable to check if any element satisfies the given condition.

predicate - The condition to test every element.

Returns:

A subscription function for creating the target Observable.

exists

public static <T> Observable.OnSubscribeFunc<java.lang.Boolean> exists(Observable<? extends T> source,
                                                                       Func1<? super T,java.lang.Boolean> predicate)