Quiz · Functions · lesson 8 of 10
Quiz — a callback with one parameter
What happens when this program is compiled and run (lines separated by spaces)?
type Handler = (value: number, index: number) => void;
function each(nums: number[], fn: Handler) {
for (let i = 0; i < nums.length; i++) {
fn(nums[i], i);
}
}
each([1, 2], (v) => console.log(v));
