RUBY Beginner's Crash Course: Ruby for Beginner's Guide to Ruby Programming, Ruby On Rails & Rails Programming

By Quick Start Guides

Ruby is a computer programming language created in the 1990s by the Japanese programmer Matz, whose full name is Yukihiro Matsumoto. It was designed to make programming fun, and is one of the few computer languages that emphasize human comprehension over machine logic.

 

Ruby is fast becoming one of the most popular languages for developing web applications. Ruby on Rails, developed by David Heinemeier Hansson to work with Ruby, introduced more people to Ruby. Now, a language that may otherwise have remained unknown has a buzzing community of programmers. They welcome beginners and are focused on one thing – producing the highest quality code.

 

I have written this book to give inexperienced people an overview of Ruby and Ruby on Rails. Applying the principles and the knowledge that you learn in this book will help you build a strong foundation in Ruby programming, enough to allow you to move on to more advanced programming.

 

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• Language: English
• Publisher: ND Publishing
• Release date: Oct 19, 2021
• ISBN: 9781393670124

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Ruby Beginner’s Crash Course

Beginner’s Guide to Ruby Programming, Ruby On Rails & Rails Programming

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Table of Contents

Introduction

Chapter 1 – What is Ruby?

Features

Implementations

Official Ruby interpreter

Rubinius & JRuby

Ruby – an inside look

Virtual machines

The Ruby virtual machine

Rubinius

JRuby

Chapter 2 – How to Use Ruby

Required knowledge

Required software

Chapter 3 – How to Install Ruby

Windows

Linux

Chapter 4 – Let’s Get Started

How your computer evaluates Ruby

Ruby objects

Ruby methods

Ruby classes

Ruby class instances

Chapter 5 – How Data Is Structured In Ruby

Variables

Local

Global

Constant

Class

Instance

How to use the different variable types

Ruby strings

Ruby collections

Arrays

Ruby iterators

Blocks

Ruby hashes

Symbols

The BEGIN statement

The END statement

Comments in Ruby

Chapter 6 – Input & Output Methods in Ruby

Reading input from the screen

Writing output to the screen

The chomp method

Chapter 7 – Conditional Structures in Ruby

If... else statements

The if modifier

The unless statement

The unless modifier

The case statement

Chapter 8 – Loops in Ruby

The while statement

The while modifier

The until statement

The until modifier

The for statement

The break statement

The next statement

The redo statement

The retry statement

Chapter 9 – Ruby Methods

Declaration & definition of methods

Return values of a method

The return statement

Variable number of parameters

Methods in a class

The alias statement

The undef statement

Chapter 10 – How to Write a Web Application Using Ruby on Rails

Installing the software

Installing the Bundler gem

Installing Rails

Creating the Rails app

A first look at Bundler & Gemfile

Run the development server

An introduction to MVC patterns and Rails

Add a bookmark resource

Database migration

The bookmark model

The bookmarks controller & views

Routes

Try the server

Adding users & authentication

Installing Devise

Generating a user model

Associating users & bookmarks

Requiring authentication for bookmark management

Try the server (again)

Handling wrong inputs

Model validations

When resources aren’t found

Making improvements a step at a time

Root page

Nicer GUI

Prettier forms

Chapter 11 – The Command Line in Rails

rails new

rails server

rails generate

rails console

The app and helper objects

rails runner

rails destroy

Chapter 12 – Useful Programs in Ruby

Print the reverse of a string

Find if a string is a palindrome

Generate the Fibonacci series

Find the factorial of a number

Find the second biggest number from an array

Conclusion

Introduction

Ruby is a computer programming language created in the 1990s by the Japanese programmer Matz, whose full name is Yukihiro Matsumoto. It was designed to make programming fun, and is one of the few computer languages that emphasize human comprehension over machine logic.

Ruby is fast becoming one of the most popular languages for developing web applications. Ruby on Rails, developed by David Heinemeier Hansson to work with Ruby, introduced more people to Ruby. Now, a language that may otherwise have remained unknown has a buzzing community of programmers. They welcome beginners and are focused on one thing – producing the highest quality code.

Many people perceive computer programming as difficult, but it really isn’t. It does require you to have a certain mindset, though, a real thirst for knowledge and learning. When you adopt this mindset, you will find that programming is not as frustrating as you might have feared. It can be fun, and successful programming is very rewarding, provided you possess enough patience to see you through.

I have written this book to give inexperienced people an overview of Ruby and Ruby on Rails. Applying the principles and the knowledge that you learn in this book will help you build a strong foundation in Ruby programming, enough to allow you to move on to more advanced programming.

Chapter 1 – What is Ruby?

Ruby stands alone as the most unique of the object-oriented computer scripting languages. In many of these languages, some things