Answers to Dummies

Why JavaScript classes have only methods?

Because a class definition always defines prototype methods. Class variables are possible, but you wouldn't use prototype to set them.

What is a callback function?

Developer will call a method and pass a function (as an argument) that will get called back by the underlying implementation.

JavaScript Testing

More than one year old, but this blog is still my heart winner!!

Read more: http://thejsguy.com/2015/01/12/jasmine-vs-mocha-chai-and-sinon.html

Some other useful links:


http://sinonjs.org/

https://facebook.github.io/jest/

https://medium.com/powtoon-engineering/a-complete-guide-to-testing-javascript-in-2017-a217b4cd5a2a

http://blog.testdouble.com/posts/2016-03-13-testdouble-vs-sinon

How to push a NodeJS application to Heroku

Start with these simple instructions:

https://devcenter.heroku.com/articles/getting-started-with-nodejs#introduction

And look for the very short-cut instructions here :)
https://dev.to/smithmanny/deploy-your-react-app-to-heroku-2b6f

Also, look at this article to push nodejs, express app to heroku in 10 steps:
https://medium.com/@grantspilsbury/build-and-deploy-a-node-express-server-to-heroku-in-10-steps-70c936ab15dc

JSON Schema Validator - Some examples

Online JSON Schema Validator: http://www.jsonschemavalidator.net/

And practice these examples: https://json-schema-validator-examples.herokuapp.com

AJV - the JSON Schema validator

• Ajv is the fastest JSON Schema validator for node.js and browser.
• Ajv compiles schemas into functions - ajv.compile(<your schema>)
• ajv.validate(<your json data>) returns the errors.

So far I feel comfortable with this site to practice JSON validations: 

https://json-schema-validator.herokuapp.com/

Read more:
https://www.npmjs.com/package/ajv

http://json-schema.org/latest/json-schema-validation.html

http://www.jsonschemavalidator.net/

https://json-schema-validator.herokuapp.com/

http://www.jsonschemavalidator.net/

http://regexr.com/

https://davidwalsh.name/json-validation
https://spacetelescope.github.io/understanding-json-schema/reference/combining.html
http://json-schema.org/example2.html

24 Chambers of Shaolin

1. Create a NodeJs application with express
2. Create a NodeJS application with routes, MongoDB
3. Create a NodeJS application with RestAPI (creating and consuming)
4. Create a NodeJS + Spring Boot application with RestAPI
5. JavaScript advanced topics like Promises, Array methods, callbacks, call, apply, bind, curry
6. JavaScript ES6 - Fundamentals
7. JavaScript TypeScript - Fundamentals
8. ReactJS fundamentals
9. ReactJs application
10. ReactJS application with Routes
11. ReactJS, Redux application
12. ReactJS + Spring Boot application with Rest API
13. Testing - unit, integration
14. Debugging
15. Deployment of NodeJS application
16. Jenkins pipelines
17. git commands
18. Unix Shell scripts
19. SaaS CSS basics
20. Responsive web design
21. GIT
22. MAC
23. Maven, ant, Gradle
24. Gulp, Grunt, web pack

More on Spring Boot Annotations

This web site explains some of the key Spring Boot annotations that I came across while working on a Spring Boot application.

http://zetcode.com/articles/springbootbean/

A sample of explanation: Spring @Bean annotation tells that a method produces a bean to be managed by the Spring container. It is a method-level annotation. During Java configuration (@Configuration), the method is executed and its return value is registered as a bean within a BeanFactory.

You see, it's that simple and cool :)