pick object keys utility

Create a new object with only the specified keys. Immutable subset of an object.

export function pick<T extends object, K extends keyof T>(
  obj: T,
  keys: K[]
): Pick<T, K> {
  return keys.reduce((acc, key) => {
    if (key in obj) acc[key] = obj[key];
    return acc;
  }, {} as Pick<T, K>);
}

// pick({ a: 1, b: 2, c: 3 }, ['a', 'c']) => { a: 1, c: 3 }

How to use

Pass an object and an array of keys. Returns a new object with only those keys (if present).

Whitelist fields before sending to API or building a subset.

pick(user, ['id', 'name', 'email']);