emit items only if the last value of another observable meets a condition

Question

I need to implement an observable that would ask to load data only if it's not already being loaded. I was thinking of having two observables: one for load requests and another for loading state. I'm not sure if the following scenario is possible and need your guidance:

load request observable: -- request -- skip whatever items unless state is False -- another request

Is loading state observable: -- True -------------------------------------------------------------False---

Thanks.

P.S. I wish the solution wouldn't contain side effects.

score 1 · Answer 1 · edited May 23 '17 at 10:26

1

Here I gave an example for an image-caching solution which made sure images to a specific URL are loaded once.

edited May 23 '17 at 10:26

Community

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answered May 18 '15 at 15:00

akarnokd

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Thanks! Do you think it's possible to avoid side effects in my scenario? – midnight May 18 '15 at 15:33
What kind of side-effects do you want to avoid? – akarnokd May 18 '15 at 16:18

emit items only if the last value of another observable meets a condition

1 Answers1