CS121 Learn JavaScript Programming

In this Section Jump right into programming work along with me in this fun project.  You will use and learn conditionals, logical operators, variables, strings concatenation and more. 

What you will learn and do in the lab.

Set up the free tool repl.it to program in JavaScript
Group project explanation. 
Understand and use variables. 
Perform Basic math operations using variables.
Display variable values to the console.
Learn and use comments in your programs.
Learn to concatenate Strings.

After this project in the remainder of this section we do a quick

Concept Reinforcement

Exercise Reinforcement

Then a final Project

Dive Deeper into conditionals as we use the else statement in our project.  Download and run the code and work along with me.

Understand Program Flow
Understand and use simple conditionals and logical operators

Code is the same from previous lecture testing performed and conditional operations are discussed. 

Learn advanced testing techniques for sanity checks
Learn detailed conditional operations

Detailed explanation of if/ if else statements and problems that can arise

Solution to the if / if else Pitfalls use if / elsif / else to solve the Pitfalls introduced from the if / if else statements

We test to verify correct operation

Topics reviewed.

WOW! See how much programming that you know already?

Program flow
Comments
Variables
Arithmetic Operators
Assignment Operators
Data Types
Array
Conditionals
Logical Operators
Math functions

No code for this lecture

No code to download "LIVE LAB" please follow along in repl.it
Examples covered
Comments
Basic operations
Modulus 
Assignment Operators
strings
Arrays

Use Math Function

Use Conditionals and logical operators

I set up problem for you please complete the code After trying look at the solution.

Download the "Your Project Skeleton" Follow along with the video and try to complete the code.

After you succeed or tried really hard download the solution and run it.

Function Introduction

Parameter

Arguments

Return

Multiple calls to the same function results stored in variables.

No code provided in the section the program is short please follow along in repl.it

Recursive function discussion

Skeleton setup

Solution to all functions

Concept Description of chain functions
Concept Description of Callback Functions
Example of chain functions
Example of Callback Functions

Using loops with call back functions

Global Vaiables description and example code.

Local Variables description and example code.

Please try to answer the quiz question.

Why are we seeing 1515 in the result?

Use code from the last lecture.

Concept description of let

Programming example of let

Overview of functions, I hope this helps.

Thank you

andrew

Review of data types

Objects as a custom data types

Script example of Arrays and Objects

Quiz to create an object.

Pause the video and create the object then see the solution

Big concept!!!

To make many objects just use a function to write the code once and call it each time you want to make an object. hence a constructor function.  That is what functions are for.

Absolutely do not go forward until you understand constructor function go over this as many times as you need.

Use the constructor functions and prototypes to extend the employees 

Use the constructor functions and prototypes to extend the employees 

Use the constructor functions and prototypes to extend the employees 

Classes Objects and for loops.

I step you through the circle problem

Break it down from hard coded object to loop generated objects and solutions

If you are brave download circle problem and generate the solution

If you need help use the circle skeleton file.

Then check your answer with the circle solution

We go through a discussion on class extends and super.  This code is not long and I would like for you to please write this code out, every programmer needs hands on just writing code.

GOOD LUCK.

Andrew

We revisit the inheritance problem with the companies employee records.  This time we use inheritance with class extends and super to solve the problem.

Have Fun!

Andrew