js index counter code example
Example 1: javascript enumerate with index
const iterable = [...];
for (const [index, elem] in iterable.entries()) {
f(index, elem);
}
// or
iterable.forEach((elem, index) => {
f(index, elem);
});
Example 2: foreach loop javascript
const numList = [1, 2, 3];
numList.forEach((number) => {
console.log(number);
});