Function set

src/functional/set.ts:37–69

(
  collection: C,
  key: K | string,
  value: V
)

  value: V
): C;
export function set<K, V, C extends Collection<K, V> | { [key: string]: V }>(
  collection: C,
  key: K | string,
  value: V
): C {
  if (isProtoKey(key)) {
    return collection;
  }

  if (!isDataStructure(collection)) {
    throw new TypeError(
      'Cannot update non-data-structure value: ' + collection
    );
  }
  if (isImmutable(collection)) {
    // @ts-expect-error weird "set" here,
    if (!collection.set) {
      throw new TypeError(
        'Cannot update immutable value without .set() method: ' + collection
      );
    }
    // @ts-expect-error weird "set" here,
    return collection.set(key, value);
  }
  // @ts-expect-error mix of key and string here. Probably need a more fine type here
  if (hasOwnProperty.call(collection, key) && value === collection[key]) {
    return collection;
  }
  const collectionCopy = shallowCopy(collection);
  // @ts-expect-error mix of key and string here. Probably need a more fine type here
  collectionCopy[key] = value;
  return collectionCopy;
}