English | May 9, 2018 | ASIN: B07CZLVG22 | 203 pages | AZW3 | 0.38 MB

This Book Absolutely for Beginners:

“Ruby in 8 Hours” covers all essential Ruby knowledge. You can learn complete primary skills of Ruby fast and easily. The book includes more than 80 practical examples for beginners and includes tests & answers for the college exam, the engineer certification, and the job interview. 

Source Code for Download:

This book provides source code for download; you can download the source code for better study, or copy the source code to your favorite editor to test the programs. 

 Table of Contents:

Hour 1

Ruby Introduction

The First Ruby Program

Install Ruby

Ruby Irb

Ruby Editor

Comments

Ruby Program Example

Output Text

Ruby Identifier

Variable

Naming Variables

Constant

Reserved Words

BEGIN Statement

END Statement

Data Types

Integer

Float

String

Array

Hash

Range

Escape Characters

Hour 2

Method

Call a Method

Method with Parameters (1)

Method with Parameters (2)

Return

Class

Defining Class

Create Ruby Objects

The Initialize Method

Class & Object Example

Hour 3

Variables

Global Variable

Instance Variable

Class Variables

Local Variable

Constants

Arithmetical Operators

Logical Operators

Assignment Operators

Comparison Operators (1)

Comparison Operators (2)

Conditional Operator

Parallel Assignment

Range Operator

defined? Operator

Operator "."

Operator “::”

Operators Precedence

Hour 4

If Statement

If-else Statement

If-elseif Statement

While Statement

Until Statement

Break Statement

Next Statement

For-in Statement

Case Statement

Redo Statement

Block

Yield Statement

BEGIN Block

END Block

Module

Require

Include

Hour 5

String

Multi-Line String (1)

Multi-Line String (2)

Insert a String

Connect Strings

Freezing String

Comparing String

Uppercasing String

Lowercasing String

Substring (1)

Substring (2)

String Methods

Hour 6

Array

Create an Array

The Value of Elements

Accessing Array Elements

First & Last

Take

Drop

Add an Element (1)

Add an Element (2)

Insert an Element

Remove an Element (1)

Remove an Element (2)

Delete an Element

Remove Repeated Elements

Array Built-in Methods

Hash

Modify Hash

Hash built-in Methods

Hour 7

Set Date

Get Date

Set Time

Get Time

Set Datetime

Get DateTime

Set Local Time & UTC

Get Local Time & UTC

Time Zone

GM Time & Local Time

Range

Convert to Array

Included ?

Max & Min

Each Iterator

Conditional Range

“ === ” Symbol

Reverse

Each Iterator

Time Iterator

Upto Iterator

Step Iterator

Hour 8

File

Create File Object (1)

Create File Object (2)

Create File Object (3)

Create File Object (4)

Rename a File

Delete a File

Gets

Putc

File Check (1)

File Check (2)

Show Current Folder

Create & Specify a Folder

Delete a Folder

Close File

File Methods

Directory Methods

Exceptions

Handling Exception

Exception Type

Raise

Rescue

Exception Object

Retry

Else

Ensure

Appendix Ruby Tests & Answers