Partial application in JavaScript
JavaScript interview exercise on Functions, difficulty 2 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write partial(fn, ...preset) that returns a function which calls fn with the preset arguments followed by any new ones.
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.