pickBy
pickBy() function
Returns a partial copy of an object which contains only the keys that satisfy the supplied predicate.
Signature:
declare function pickBy<T extends object, F extends AsyncEntryPredicate<T>>(f: F, obj: T): Promise<Partial<T>>;
Returns:
Promise<Partial<T>>
Example
const obj = { a: 1, b: "2", c: true };
pickBy(([key, value]) => key === "a" || value === true, obj); // { a: 1, c: true }
// asynchronous predicate
await pickBy(async ([key, value]) => key === "a" || value === true, obj); // { a: 1, c: true }
// Using with the `pipe` function
pipe(
obj,
pickBy(([key, value]) => key === "a" || value === true)
);
await pipe(
obj,
pickBy(async ([key, value]) => key === "a" || value === true)
);