JavaScript in Plain Language - A Self-Study Method: JSON and AngularJS Prep

309 Pages·2014·1.95 MB·English

by  Tony de Araujo

JavaScript in Plain Language
A Self-Study Method
JSON and AngularJS Prep
by
Tony de Araujo
Technical Instructor
New Jersey – USA
Fully updated on October 2015
ALSO BY TONY DE ARAU JO
JavaScript Objects Functions and Arrays Explained
Small Projects to Learn JavaScript - Drawing Six 'Lucky' Numbers
AngularJS Supplement: Easy Projects on Filters and Directives
copyright © Tony de Araujo
All Rights Reserved
To my family and friends
all my readers, Amazon
and Amazon supporting staff...
Thank you so much!
This eBook works best when using the free Kindle Reading App due to all the
resources given and all the linked exercises.
You can download an Amazon Kindle Reading App from the following link:
amazon.com/gp/digital/fiona/kcp-landing-page
Table of Contents
Introduction
What you should know before reading this material
What is JavaScript
PART I: AT THE GATES OF ENLIGHTENMENT
1.1 The browser interface
1.2 Material and tools needed
1.3 Declaring a variable – an alias name for a memory location
About var
About the variable name
About the semicolon ;
Adding data to variables
Changing the value in the variable
Adding words to a variable instead of numbers
Let’s talk about strings
Which quotes to use: single or double?
Assigning variables to other variables
1.4 Lab work 1
Opening the Console
Declaring some variables
Inspecting the data type of a variable
What is typeof?
Why it “undefined” and what is undefined?
1.5 Manipulating variable data
Methods and Properties
The DOT operator
The Bracket notation
An example of a method
What’s with the parentheses ( ) ?
1.6 Lab work 2
Declaring variables, assigning values, using basic properties and methods
1.7 Adding some more JavaScript operators
+, -, +=, -=, , =, %, , =
The + plus operator
Using the + plus operator to add two numbers
Using the += assignment operator
The ++ (double plus) incrementing operator
The –, -- and -= subtraction operators
The Division or = Operators
The Modulus % Operator
The Multiplication Operator *
1.8 Lab work 3
Part one: working with +, += , ++ and --
Part two: Working with *, /, *=, /= and %
1.9 Comparison operators and booleans
===, !==, <, >, <=, >= true, false
What is a Boolean?
1.10 Lab work 4
Practicing with ===, !==, <, >, <=, >= true, false.
1.11 Introducing console.log, alert, prompt, confirm
The console.log
alert( )
confirm() and prompt()
1.12 Logical Operators
And: &&
Or: ||
Not: !
1.13 Lab work 5
Getting feedback from a user
PART II: ENTERING THE SECOND REALM
2.1 Adding more syntax
Code blocks - Using an editor
Commenting code
2.2 Conditional Branching
if, else conditionals
Reviewing if(), else
What about else?
Adding a second condition in the middle of if(), else
How to physically write the braces in a conditional statement
When to use an else if()
Is Programming an Art or a Science?
2.3 The anatomy of a function
Preliminary things to know about a function
Scripting a function
What is a function call?
What is the purpose of return?
What happens to the data when a function returns?
2.4 Lab work 6
Create a program to convert Fahrenheit to Celsius
Create a program to convert Celsius to Fahrenheit
In JavaScript a function always returns something
A program to convert Fahrenheit to/from Celsius
2.5 Filling out a form to request a loop
What no one tells you about loops
2.6 The for loop
2.7 Looping over a string of characters
2.8 Lab work 7
Searching for the position of a string character
Counting numbers and declaring their odd/even quality
Counting apples
2.9 Array lists
Strings versus arrays
Array syntax
Using push() and unshift() to insert elements into an array
Printing array items with a for loop