public static IRxVal <B> map <A, B>(this IRxVal <A> src, Fn <A, B> mapper) =>
new RxVal <B>(
mapper(src.value),
setValue => src.subscribeWithoutEmit(
NoOpDisposableTracker.instance, a => setValue(mapper(a))
)
);
public static IRxVal <R> zip <A1, A2, R>(
this IRxVal <A1> a1Src, IRxVal <A2> a2Src, Fn <A1, A2, R> zipper
) =>
new RxVal <R>(
zipper(a1Src.value, a2Src.value),
setValue => {
var tracker = NoOpDisposableTracker.instance;
var a1Sub = a1Src.subscribeWithoutEmit(tracker, a1 => setValue(zipper(a1, a2Src.value)));
var a2Sub = a2Src.subscribeWithoutEmit(tracker, a2 => setValue(zipper(a1Src.value, a2)));
return(a1Sub.join(a2Sub));
}
);
public static IRxVal <B> flatMap <A, B>(this IRxVal <A> src, Fn <A, IRxVal <B> > mapper)
{
var bRx = mapper(src.value);
return(new RxVal <B>(
bRx.value,
setValue => {
var tracker = NoOpDisposableTracker.instance;
var subToBRx = bRx.subscribeWithoutEmit(tracker, b => setValue(b));
var aSub = src.subscribeWithoutEmit(
tracker,
a => {
subToBRx.unsubscribe();
bRx = mapper(a);
setValue(bRx.value);
subToBRx = bRx.subscribeWithoutEmit(tracker, b => setValue(b));
}
);
return aSub.andThen(() => subToBRx.unsubscribe());
}
));
}