Pick keys

TypeScript Pick

Pick keys from an object to construct a picked object, with full type support.

const pick = <T, K extends keyof T>(obj: T, keys: K[]) =>
  keys.reduce(
    (pickedObj, currentKey) => {
      pickedObj[currentKey] = obj[currentKey];
      return pickedObj;
    },
    {} as Pick<T, K>
  );

Example Usage

const x = { a: 1, b: 2, c: 3 };
const y = pick(x, ['b']);
// { b: 2 }