Make combineLatest 'forget' its last Invocation in RxJS

Question

I'm using combineLatest to combine two streams A and B.

If stream A produces a value it combines it with the last value of B and produces a value on the result stream.

However i want it to forget about the last value of B after every invocation, so that the next time an A is chosen a new B needs to be produced for the result stream to produce a new value.

I want this to be symmetric so the same goes for the other way around.

Example:

A -- 1 -- 2 -- 3 ------------- 4 ------

               (3,1)         (4,3)

B -------------- 1 ---- 2 --- 3 --------

I found this answer: How to throttle event stream using RX?

However it is written in C# while i need the answer for RxJS.

@Bergi nah, if you look at the example zip would produce: (1,1)(2,2)(3,3) completed. — Christoph Hegemann, Dec 17 '14 at 16:15

score 2 · Accepted Answer · answered Dec 17 '14 at 21:15

2

For anyone struggling as I did:

I just found the flatMapLatest function which does exactly what i need.

answered Dec 17 '14 at 21:15

Christoph Hegemann

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Make combineLatest 'forget' its last Invocation in RxJS

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