/**
* If the {@link Observable} completes after emitting a single item that matches a given
* predicate, return that item, otherwise throw an <code>NoSuchElementException</code>.
*
* <p><img width="640"
* src="https://github.com/Netflix/RxJava/wiki/images/rx-operators/B.single.p.png">
*
* @param predicate a predicate function to evaluate items emitted by the {@link Observable}
* @return the single item emitted by the source {@link Observable} that matches the predicate
* @see <a
* href="https://github.com/Netflix/RxJava/wiki/Blocking-Observable-Operators#single-and-singleordefault">RxJava
* Wiki: single()</a>
* @see <a
* href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.single.aspx">MSDN:
* Observable.Single</a>
*/
public T single(Func1<? super T, Boolean> predicate) {
return from(o.single(predicate)).toIterable().iterator().next();
}
/**
* If the {@link Observable} completes after emitting a single item, return that item, otherwise
* throw an <code>NoSuchElementException</code>.
*
* <p><img width="640"
* src="https://github.com/Netflix/RxJava/wiki/images/rx-operators/B.single.png">
*
* @return the single item emitted by the {@link Observable}
* @see <a
* href="https://github.com/Netflix/RxJava/wiki/Blocking-Observable-Operators#single-and-singleordefault">RxJava
* Wiki: single()</a>
* @see <a
* href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.single.aspx">MSDN:
* Observable.Single</a>
*/
public T single() {
return from(o.single()).toIterable().iterator().next();
}