Rx.Observable.prototype.some([predicate], [thisArg])

Determines whether any element of an observable sequence satisfies a condition if present, else if any items are in the sequence. There is an alias to this method called any.

参数

1. predicate (Function): A function to test each source element for a condition. The callback is called with the following information:
   1. the value of the element
   2. the index of the element
   3. the Observable object being subscribed
2. [thisArg] (Any): Object to use as this when executing callback.

返回值

(Observable): An observable sequence containing a single element determining whether all elements in the source sequence pass the test in the specified predicate.

例