pick and omit should preserve prototype, property descriptors, and extensibility

[yuhr]

Is your feature request related to a problem? Please describe.

I'm not sure this is classified as a bug or a feature request, but maybe rather a proposal thing.

As I wrote in #5922 (comment), I think filtering functions like pick and omit should preserve the semantics of the original object as much as possible. Thus the prototype, the property descriptors, and the extensibility should be copied to the result.

Describe the solution you'd like

For example, the code of pick should be like below:

export function pick<T extends object, K extends keyof T>(
  obj: Readonly<T>,
  keys: readonly K[],
): Pick<T, K> {
  const result = Object.create(Object.getPrototypeOf(obj));
  for (const key of keys) {
    const descriptor = Object.getOwnPropertyDescriptor(obj, key);
    if (descriptor) Object.defineProperty(result, key, descriptor);
  }
  if (!Object.isExtensible(obj)) Object.preventExtensions(result);
  return result;
}

Is this an acceptable change to the APIs? If so, could someone enumerate APIs that should be rewritten?

• pick
• omit

[iuioiua]

Idk, this seems like over-engineering an otherwise simple function.