How to pass variables to other functions inside object in javascript

Question

var myCar2 = {

    maxSpeed: 70,
    driver: "Arnold",

    drive: function(speed, time) {
        console.log("speed " + (speed * time));
    },

    logbook: function(a , b) {      
        console.log("max speed " + this.maxSpeed + " " + this.drive(a , b));
    }
};

myCar2.logbook(3 , 6);

If I run that code this.drive(a , b) is undefined. How can i pass variables to drive() function using logbook()?

This should work just fine as is. The only thing is that you're not returning anything from drive, so its return value is undefined. — deceze
– deceze ♦, Commented Apr 19, 2016 at 7:45
yes i dont use return. Thank you now with return i get what i want. — pZCZ
– pZCZ, Commented Apr 19, 2016 at 7:50

Quentin · Accepted Answer · 2016-04-19 07:45:49Z

7

You are passing variables to drive, and they are defined within it. If they weren't then you wouldn't get speed 18 in the output, you would get speed NaN.

The undefined value is the return value of drive, which is because you haven't put a return statement in that function.

answered Apr 19, 2016 at 7:45

Quentin

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