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Otbivnoe/FlatMapNilExtension.swift

Created March 2, 2017 14:21
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FlatMapNilExtension.swift
extension ObservableType {
func flatMap<A: AnyObject, O: ObservableType>(weak obj: A, selector: @escaping (A, Self.E) throws -> O) -> Observable<O.E> {
return flatMap { [weak obj] value -> Observable<O.E> in
try obj.map { try selector($0, value).asObservable() } ?? .empty()
}
}
}
@dsk1306
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dsk1306 commented Feb 12, 2019

You could use O: ObservableConvertibleType instead of O: ObservableType. It would make possible to use, for instance, Driver without the need to use asObservable() in selector.

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