April 2018
Beginner to intermediate
426 pages
10h 19m
English
Sometimes, we need to iterate the elements of an array. We have learned that we can use a loop construct to do this, such as the for statement, as we saw in some previous examples.
JavaScript also has some built-in iterator methods that we can use with arrays. For the examples in this section, we will need an array and a function. We will use an array with values from 1 to 15 and a function that returns true if the number is a multiple of 2 (even) and false otherwise. The code is presented as follows:
function isEven(x) {
// returns true if x is a multiple of 2.
console.log(x);
return x % 2 === 0 ? true : false;
}
let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];