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);
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);
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
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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