Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Imagine that you’ve written a JavaScript constructor for a custom clownfish object with a position property and then added the following statements:

clownfish.prototype.swimForward = function(distanceInCm) {

   this.position += distanceInCm;

};

Now you would like to apply the swimForward() method to a similar custom object called lionfish. What statement(s) could you use to do this?

a.
You can call theswimForward()method only on objects of theclownfishclass because it is a private method.
b.
let spikey = new clownfish();

lionfish.prototype.swimForward.call(spikey, 50);

c.
let spikey = new lionfish();

clownfish.prototype.swimForward.apply(spikey, 50);

d.
let spikey = new lionfish();

clownfish.prototype.swimForward.call(spikey, 50);

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