Final exam

The final JavaScript exam

Five tasks, each combining several topics of the course. There are no hints: if you get stuck, go back to the topic listed for the task and reread the cheat sheet.

Tips:

• read the statement to the end — especially the edge cases: an empty array, zero, spaces;
• test your function on the examples from the statement by calling it with console.log(…);
• don't change the input data if the task says the original array doesn't change;
• small helper functions make a solution clearer.

Good luck!