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Learn Ruby the Hard Way: Comments and Pound Characters The Hard Way Is Easier: An Introduction to Learn Ruby the Hard Way Sample Pages. Download the sample pages (includes Exercises 1–2 and Index) Table of Contents. Acknowledgments 1. The Hard Way Is Easier 2. Reading and Writing 2. Download learn ruby the hard way a simple and idiomatic introduction to the imaginative world of computational thinking with code 3rd edition zed shaw s hard way series in pdf or read learn ruby the hard way a simple and idiomatic introduction to the imaginative world of computational thinking with code 3rd edition zed shaw s hard way series in pdf online books in PDF, EPUB and Mobi Format.

Learn Python The Hard Way 3rd Edition free pdf download

The Python interpreter can run Python programs that are saved in files, or interactively execute Python statements that are typed at the keyboard. Python comes with a program named IDLE that simplifies the process of
writing, executing, and testing programs.

In this book(Learn Python The Hard Way 3rd Edition free pdf download), we will use a high-level programming language called Python, which was developed in the early 1990s by Guido van Rossum. Van Rossum needed to carry out repetitive tasks for administering computer systems. He was dissatisfied with other available languages that were optimized for writing large and fast programs. He needed to write smaller programs that didn’t have to run at optimum speed.

Before you can try any of the programs shown in this book, or write any programs of your own, you need to make sure that Python is installed on your computer and properly configured. If you are working in a computer lab, this has probably been done already. If you are using your own computer, you can follow the instructions in Appendix A to install Python from the accompanying CD.

You learned earlier that Python is an interpreted language. When you install the Python language on your computer, one of the items that is installed is the Python interpreter. The Python interpreter is a program that can read Python programming statements and execute them. (Sometimes we will refer to the Python interpreter simply as the interpreter.) You can use the interpreter in two modes: interactive mode and script mode. In interactive mode, the interpreter waits for you to type Python statements on the keyboard. Once you type a statement, the interpreter executes it and then waits for you to type another statement. In script mode, the interpreter reads the contents of a file that contains Python statements. Such a file is known as a Python program or a Python script. The interpreter executes each statement in the Python program as it reads it.

This ebook(Learn Python The Hard Way 3rd Edition free pdf download) contains these contents:

The Hard Way Is Easier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Reading and Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Attention to Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Spotting Differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Do Not Copy- Paste . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A Note on Practice and Persistence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A Warning for the Smarties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Exercise 0 The Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mac OSX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OSX: What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Windows: What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Linux: What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Warnings for Beginners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Exercise 1 A Good First Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Exercise 2 Comments and Pound Characters . . . . . . . . . . . . . . . . . . . . 18
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Exercise 3 Numbers and Math . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Exercise 4 Variables and Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Exercise 5 More Variables and Printing . . . . . . . . . . . . . . . . . . . . . . . . . 28
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Exercise 6 Strings and Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Exercise 7 More Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Exercise 8 Printing, Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Exercise 9 Printing, Printing, Printing . . . . . . . . . . . . . . . . . . . . . . . . . . 36
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Exercise 10 What Was That? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Escape Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Exercise 11 Asking Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Exercise 12 Prompting People . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Exercise 13 Parameters, Unpacking, Variables . . . . . . . . . . . . . . . . . . . . 46
Hold Up! Features Have Another Name . . . . . . . . . . . . . . . . . . . . . . . 46
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Exercise 14 Prompting and Passing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Exercise 15 Reading Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Exercise 16 Reading and Writing Files . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Exercise 17 More Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Exercise 18 Names, Variables, Code, Functions . . . . . . . . . . . . . . . . . . . . 66
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Exercise 19 Functions and Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Exercise 20 Functions and Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Exercise 21 Functions Can Return Something . . . . . . . . . . . . . . . . . . . . . 78
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Exercise 22 What Do You Know So Far? . . . . . . . . . . . . . . . . . . . . . . . . . 81
What You Are Learning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Exercise 23 Read Some Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Exercise 24 More Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Exercise 25 Even More Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Exercise 26 Congratulations, Take a Test! . . . . . . . . . . . . . . . . . . . . . . . . 90
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Exercise 27 Memorizing Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
The Truth Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
The Truth Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Exercise 28 Boolean Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Exercise 29 What If . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
What You Should See . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Study Drills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Common Student Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

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  • Author: Zed A. Shaw
  • Format: online HTML
  • Price: free (print edition available on Amazon)

In Learn Ruby the Hard Way, Third Edition , you’ll learn Ruby by working through 52 brilliantly crafted exercises. Read them. Type their code precisely. (No copying and pasting!) Fix your mistakes. Watch the programs run. As you do, you’ll learn how software works; what good programs look like; how to read, write, and think about code; and how to find and fix your mistakes using tricks professional programmers use.

Chapters include:

  • The Setup
  • A Good First Program
  • Comments And Pound Characters
  • Numbers And Math
  • Variables And Names
  • More Variables And Printing
  • Strings And Text
  • More Printing
  • Printing, Printing
  • Printing, Printing, Printing
  • What Was That?
  • Asking Questions
  • Prompting People
  • Parameters, Unpacking, Variables
  • Prompting And Passing
  • Reading Files
  • Reading And Writing Files
  • More Files
  • Names, Variables, Code, Functions
  • Functions And Variables
  • Functions And Files
  • Functions Can Return Something
  • What Do You Know So Far?
  • Read Some Code
  • More Practice
  • Even More Practice
  • Congratulations, Take A Test!
  • Memorizing Logic
  • Boolean Practice
  • What If
  • Else And If
  • Making Decisions
  • Loops And Arrays
  • While Loops
  • Accessing Elements Of Arrays
  • Branches and Functions
  • Designing and Debugging
  • Symbol Review
  • Doing Things To Arrays
  • Dictionaries, Oh Lovely Dictionaries
  • Modules, Classes, And Objects
  • Learning To Speak Object Oriented
  • Is-A, Has-A, Objects, and Classes
  • Gothons From Planet Percal #25
  • Inheritance Vs. Composition
  • You Make A Game
  • A Project Skeleton
  • Automated Testing
  • Advanced User Input
  • Making Sentences
  • Your First Website
  • Getting Input From A Browser
  • The Start Of Your Web Game
  • Advice From An Old Programmer
  • Next Steps
  • Command Line Crash Course

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