JS Examples
Small examples are useful when you change one input and predict the new output. Combine array filtering with a calculation.
Where to run this
This example uses the JavaScript console playground. Select Run to execute it; the example does not run on this lesson page.
A practical example
const bookings = [2, 0, 4];
const active = bookings.filter(count => count > 0);
console.log(active.reduce((total, count) => total + count, 0));
What happens
The active bookings total 6 places.