Functions in JavaScript: interview exercises

Functions in JavaScript: 4 test-checked interview exercises (Counter with closure, Compose functions), each beside a worked example, with tests as you go. Free.

1. Counter with closure
2. Compose functions
3. Memoize a function
4. Partial application

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.

More JavaScript topics

• Strings
• Arrays
• Objects
• Async
• Practical

All JavaScript exercises · Other languages and frameworks