Pick keys in JavaScript
JavaScript interview exercise on Objects, difficulty 1 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write pick(obj, keys) that returns a new object containing only the listed keys that exist on obj.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.