filterNotNull() doesn't chain unsubscribe()

[reactivex]

filterNotNull() doesn't chain unsubscribe()

[zsxwing]

requireNoNulls, withIndex have similar issue as well.

[dsvoronin]

i use this extensions func in my projects, works well, can PR

public fun <T : Any> Observable<T?>.filterNotNull(): Observable<T> = filter { it != null }.map { it as T }

[zsxwing]

Go ahead :) You can also fix requireNoNulls and withIndex as well. Just use the existing operators instead of lift.

[zsxwing]

Resolved by #39