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Hands-on JavaScript for Python Developers

You're reading from   Hands-on JavaScript for Python Developers Leverage your Python knowledge to quickly learn JavaScript and advance your web development career

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Product type Paperback
Published in Sep 2020
Publisher Packt
ISBN-13 9781838648121
Length 410 pages
Edition 1st Edition
Languages
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Author (1):
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Sonyl Nagale Sonyl Nagale
Author Profile Icon Sonyl Nagale
Sonyl Nagale
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Toc

Table of Contents (26) Chapters Close

Preface 1. Section 1 - What is JavaScript? What is it not?
2. The Entrance of JavaScript into Mainstream Programming FREE CHAPTER 3. Can We Use JavaScript Server-Side? Sure! 4. Nitty-Gritty Grammar 5. Data and Your Friend, JSON 6. Section 2 - Using JavaScript on the Front-End
7. Hello World! and Beyond: Your First Application 8. The Document Object Model (DOM) 9. Events, Event-Driven Design, and APIs 10. Working with Frameworks and Libraries 11. Deciphering Error Messages and Performance Leaks 12. JavaScript, Ruler of the Frontend 13. Section 3 - The Back-End: Node.js vs. Python
14. What Is Node.js? 15. Node.js versus Python 16. Using Express 17. React with Django 18. Combining Node.js with the Frontend 19. Enter Webpack 20. Section 4 - Communicating with Databases
21. Security and Keys 22. Node.js and MongoDB 23. Putting It All Together 24. Assessments 25. Other Books You May Enjoy

Questions

Consider the following code:

function someFunc() {
let bar = 1;

function zip() {
alert(bar); // 1
let beep = 2;

function foo() {
alert(bar); // 1
alert(beep); // 2
}
}

return zip
}


function sayHello(name) {
const sayAlert = function() {
alert(greeting)
}

const sayZip = function() {
someFunc.zip()
}

let greeting = `Hello ${name}`
return sayAlert
}
  1. How would you get an alert of Hello Bob?
    1. sayHello()('Bob')
    2. sayHello('Bob')()
    3. sayHello('Bob')
    4. someFunc()(sayHello('Bob'))
  2. What will alert(greeting) do in the preceding code?
    1. Alert greeting.
    2. Alert Hello Alice.
    3. Throw an error.
    4. None of the above.
  3. How would we get an alert message of 1?
    1. someFunc()()
    2. sayHello().sayZip()
    3. alert(someFunc.bar)
    4. sayZip()
  4. How would we get an alert message of 2?
    1. someFunc().foo().
    2. someFunc()().beep.
    3. We can't because it's not in the scope.
    4. We can't because it's not defined.
  5. How can we change someFunc to alert...
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