Pick key-value pair from an object in a type-safe fashion.

pick.ts

function pick<T, K extends Array<keyof T>>(
  obj: T,
  keys: K
): Pick<T, K[number]> {
  return Object.fromEntries(
    keys.filter((key) => key in obj).map((key) => [key, obj[key]])
  ) as Pick<T, K[number]>;
}

// Usage:
interface MyObject {
  foo: string;
  bar: string;
  baz: number;
}

const myObj: MyObject = { foo: 'bar', bar: 'baz', baz: 1 };

const picked = pick(myObj, ['foo', 'baz']);
// { foo: string; baz: number }