combine function for property

[PalmZE]

@raveclassic, hi!

Looks like typescript is finally ready to express combine function using tuple types:

type PropertyValue<A> = A extends Property<infer U> ? U : never;
type MapPropsToValues<PS extends [Property<unknown>, ...Property<unknown>[]]> = {
  [K in keyof PS]: PropertyValue<PS[K]>;
};

function combine<PS extends [Property<unknown>, ...Property<unknown>[]], B>(
  ...args: [...PS, (...values: MapPropsToValues<PS>) => B]
): Property<B>;

Correctly inferred types:

const p1 = constProperty(1);
const p2 = constProperty('');
const p3 = constProperty(true);
const p4 = constProperty(new Date());
const pr = combine(p1, p2, p3, p4, (v1, v2, v3, v4) => {
  return { name: 'Bar' };
});

Would you accept a PR that adds combine to property API?

[raveclassic]

@PalmZE Sure, feel free to do that 🎉

[raveclassic]

Hey @PalmZE , I've just pushed 1.0.0.alpha to master, it contains the combine combinator.
However the structure of the packages/API has changed.
Would you be interested in opening another PR to the 0.x.x branch?

[PalmZE]

@raveclassic sorry for the delay. Is PR to 0.x.x still relevant?

[raveclassic]

@PalmZE not sure, only if you still use it

[PalmZE]

Honestly, I'd rather use 1.x.x version the next time, closing this one.