What does the following code snippet output: let message = { hello: 'Hello', names: ['Sue', 'Joe'], showMessage: function() { let self = this; this.names.forEach(function(name) { console.log(self.hello + ' ' + name); }); } }; message.showMessage();?

Prepare for the Salesforce JavaScript Developer I Certification Exam with quizzes, flashcards, and detailed explanations. Enhance your understanding and boost your confidence to ace your certification!

Multiple Choice

What does the following code snippet output: let message = { hello: 'Hello', names: ['Sue', 'Joe'], showMessage: function() { let self = this; this.names.forEach(function(name) { console.log(self.hello + ' ' + name); }); } }; message.showMessage();?

Explanation:
The code snippet defines an object called `message` that contains a property `hello`, which is a string, a property `names`, which is an array of names, and a method `showMessage`. The purpose of the method is to iterate over the `names` array and log a message to the console that combines the `hello` property and each name. Within the `showMessage` method, `self` is set to `this`, which refers to the `message` object. The `names.forEach` method is called to iterate through each name in the `names` array. Inside the callback function passed to `forEach`, the code relies on `self` to access the `hello` property of the `message` object. As the `forEach` function executes, it accesses the `hello` property (which is 'Hello') and concatenates it with each name from the `names` array. The output will be: 1. For the first iteration, when `name` is 'Sue', it logs: "Hello Sue". 2. For the second iteration, when `name` is 'Joe', it logs: "Hello Joe". Thus, the final output of the execution of `message.showMessage

The code snippet defines an object called message that contains a property hello, which is a string, a property names, which is an array of names, and a method showMessage. The purpose of the method is to iterate over the names array and log a message to the console that combines the hello property and each name.

Within the showMessage method, self is set to this, which refers to the message object. The names.forEach method is called to iterate through each name in the names array. Inside the callback function passed to forEach, the code relies on self to access the hello property of the message object.

As the forEach function executes, it accesses the hello property (which is 'Hello') and concatenates it with each name from the names array. The output will be:

  1. For the first iteration, when name is 'Sue', it logs: "Hello Sue".

  2. For the second iteration, when name is 'Joe', it logs: "Hello Joe".

Thus, the final output of the execution of `message.showMessage

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy