// forEach - customized and array's method

function forEach(array, action) {
    for (var i = 0; i < array.length; i++) {
        action(array[i]);
    }
}

forEach(["Wampeter", "Foma", "Granfalloon"], console.log);

var numbers = [1, 2, 3, 4, 5], sum = 0;
forEach (numbers, function(number) {
    sum += number;
});
console.log(sum);

// Using the array forEach method.
var numbers = [1, 2, 3, 4, 5], sum = 0;
numbers.forEach(function(number) {
    sum += number;
});
console.log(sum);