Explaining Call and Apply; basically call and apply Invoke a Function with the given set of arguments

Invocation with the apply() and call() methods

//Invocation with the apply() and call() methods

// create a plain function
function juggle() {
    var result = 0;
    for (var n = 0; n < arguments.length; n++) {
        result += arguments[n];
    }
    //this.result = result;
    console.log(result)
}

//Invloke with plain arguments
juggle(1, 2, 3, 4)//10

//create two objects
var ninja1 = {};
var ninja2 = {};

// Execute the function juggle with new arguments
juggle.apply(ninja1, [1, 2, 3, 4]);//10
juggle.apply(null, [1, 2, 3, 4]);//10

juggle.call(ninja2, 5, 6, 7, 8);//26
juggle.call(null, 5, 6, 7, 8);//26

//console.log(ninja1)