Add support to reset a store

[jaecktec]

In certain use-cases I want to reset my store to a certain state

example:

const store = makeStore<T>({});

store.set({hello: "world"});

...

store.set({}); // does not modify the store
store.set(Object.keys(store.state).reduce((r,c) => {...r, [c]: undefined}, {})) // actually resets but is cumbersome

idea:

store.set({}, {overwrite: true});

I'd be willing to create a PR if you think this a feature that should exist in statery

[hmans]

Thanks for submitting the issue, and I agree that it would be a good feature to have! For the upcoming 0.6 release, I have started adding options to set (forceNotify in this case), and I'd be happy to change the API for that to take an options object.

If you're willing to tackle that and submit a PR, go ahead! Otherwise I would probably just take care of it some time over the next couple of weeks, as part of the work to push 0.6 out of the door.

[jaecktec]

Now that I check in the sources, maybe it's better to create a different method.
The interface is Partial<T>, however for an overwrite we should use T.

I still favour the options object - because it makes it more flexible in the future. However my suggestion is probably not working

[hmans]

That's fine. I will think about a reset (analogous to set), or something similar.

As an alternative userland workaround/solution, consider writing a function that returns the desired initial state:

const initialState = (): YourStateType => ({ foo: "bar", count: 0, stuff: undefined })

And then just using that to update the store using the normal set method:

store.set(initialState())

It will not remove properties outside of your type that were added for some reason, of course.