startit/eloquentjavascript/06_Objects/obj.js

function speak(line){
    console.log(`The ${this.type} rabbit says '${line}'`)
}

let whiteRabbit = {
    type: "white", speak
};

let hungryRabbit = {
    type: "hungry", speak
};
whiteRabbit.speak("Oh my fur and whiskers");

hungryRabbit.speak("Got any carrots?");