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Ruby by Example Concepts and Code 1st Edition by Kevin Baird 1593271603 9781593271602

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Ruby by Example Concepts and Code 1st Edition Kevin C. Baird Digital Instant Download

Author(s): Kevin C. Baird
ISBN(s): 9781593271480, 1593271484
Edition: 1
File Details: PDF, 8.16 MB
Year: 2007
Language: english
SKU: EB-972970 Category: Tag:

Ruby by Example Concepts and Code 1st Edition by Kevin Baird  – Ebook PDF Instant Download/Delivery: 1593271603, 9781593271602
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ISBN 10: 1593271603
ISBN 13: 9781593271602
Author: Kevin C. Baird

There may be no better way to learn how to program than by dissecting real, representative examples written in your language of choice. Ruby by Example analyzes a series of Ruby scripts, examining how the code works, explaining the concepts it illustrates, and showing how to modify it to suit your needs. Baird’s examples demonstrate key features of the language (such as inheritance, encapsulation, higher-order functions, and recursion), while simultaneously solving difficult problems (such as validating XML, creating a bilingual program, and creating command-line interfaces). Each chapter builds upon the previous, and each key concept is highlighted in the margin to make it easier for you to navigate the book. You’ll learn how to: –Use the interactive Ruby shell (irb) to learn key features of the language –Extend Ruby using RubyGems, the Ruby package manager –Create numerical utilities, as well as utilities that process and analyze HTML/XML –Implement purely functional and metaprogramming techniques to save time and effort –Optimize, profile, and test your code to make sure that it not only does its job, but does it well –Create web applications using Rails Ruby is the fastest growing programming language today, and for good reason: its elegant syntax and readable code make for prolific and happy programmers. But it can be difficult to understand and implement without a little help. Ruby by Example shows you how to take advantage of Ruby as you explore Ruby’s fundamental concepts in action.

Ruby by Example Concepts and Code 1st Table of contents:

1. Interactive Ruby and the Ruby Environment

Starting irb

Using irb

Expressions

Everything Is an Object

Integers, Fixnums, and Bignums

Addition, Concatenation, and Exceptions

Casting

Arrays

Booleans

Flow Control

Methods

Variables

Constants

Using the Ruby Interpreter and Environment

2. Amusements and Simple Utilities

#1 Is It Payday? (check_payday.rb)

The Code

How It Works

Defining Constants

Defining Variables

The Results

#2 Random Signature Generator (random_sig.rb and random_sig-windows.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#3 The 99 Bottles of Beer Song (99bottles.rb)

The Code

How It Works

Running the Script

The Results

#4 Sound File Player (shuffle_play.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

Chapter Recap

3. Programmer Utilities

#5 What Is Truth? (boolean_golf.rb)

The Code

How It Works

Hacking the Script

Running the Script

The Results

#6 Making a List (array_join.rb)

The Code

How It Works

Running the Script

Hacking the Script

#7 Command-Line Interface (uses_cli.rb and simple_cli.rb)

The Code

How It Works

Running the Script

Hacking the Script

#8 Palindromes (palindrome.rb and palindrome2.rb)

The Code

How It Works

Hacking the Script

Running the Script

The Results

Chapter Recap

4. Text Manipulation

#9 End-of-Line Conversion (dos2unix.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#10 Showing Line Numbers (line_num.rb)

The Code

How It Works

Running the Script

The Results

#11 Wrapping Lines of Text (softwrap.rb)

The Code

Running the Script

The Results

Hacking the Script

#12 Counting Words in a File (word_count.rb)

The Code

How It Works

Running the Script

The Results

#13 Word Histogram (most_common_words.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#14 Rotating Characters in a String (rotate.rb)

The Code

How It Works

Recursion

Running the Script

The Results

Chapter Recap

5. Number Utilities

#15 Computing Powers (power_of.rb)

The Code

How It Works

Running the Script

The Results

#16 Adding Commas to Numbers (commify.rb)

Inheritance

Modules

The Code

How It Works

The format_int Method

The format_float Method

Type Testing

Running the Script

The Results

#17 Roman Numerals (roman_numeral.rb)

The Code

How It Works

Class Variables

Hash.merge

More Recursion

Multiples of Our Base

Multiplying Strings by Integers

Running the Script

The Results

Hacking the Script

#18 Currency Conversion, Basic (currency_converter1.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#19 Currency Conversion, Advanced (currency_converter2.rb)

The Code

How It Works

Downloading Rates Information

What If You Can’t Download New Rates?

Running the Script

The Results

Hacking the Script

Chapter Recap

6. Functionalism with Blocks and Procs

#20 Our First lambda (make_incrementer.rb)

The Code

How It Works

The Results

#21 Using Procs for Filtering (matching_members.rb)

The Code

How It Works

Running the Script

The Results

#22 Using Procs for Compounded Filtering (matching_compound_members.rb)

The Code

How It Works

Blocks, Procs, and the Ampersand

Filtering with Each Proc via map

Finding the Intersections with inject

Array Intersections

The Results

Hacking the Script

#23 Returning Procs as Values (return_proc.rb)

The Code

The Results

How It Works

Proc.call(args) vs. Proc[args]

Using Procs as Blocks

The inspect Method

#24 Nesting lambdas

The Code

How It Works

#25 Procs for Text (willow_and_anya.rb)

The Code

The Him Class

The SameTimeSamePlace Class

The willow_and_anya.rb Script

How It Works

The Him Class: Creating Procs with lambda

The SameTimeSamePlace Class: Alternatives to lambda for Creating Procs

Flexible Arity for Proc.new

Blocks, Arguments, and yield

Using Both Him and SameTimeSamePlace in willow_and_anya.rb

Running the Script

The Results

Hacking the Script

Chapter Recap

7. Using, Optimizing, and Testing Functional Techniques

#26 Basic Factorials and Fibonaccis (factorial1.rb through fibonacci5.rb)

The Code

How It Works

The Results

Hacking the Script

Using include? (factorial2.rb and fibonacci2.rb)

Passing the returns1 or returns_self Array as an Argument (factorial3.rb and fibonacci3.rb)

Making RETURNS1 or RETURNS_SELF a Class Constant (factorial4.rb and fibonacci4.rb)

Memoization of Results (factorial5.rb and fibonacci5.rb)

#27 Benchmarking and Profiling (tests/test_opts.rb)

Benchmarking

The Code

How It Works

Running the Script

The Results

Profiling

Hacking the Script

#28 Converting Temperatures (temperature_converter.rb)

The Code

How It Works

The Results

Hacking the Script

#29 Testing temperature_converter.rb (tests/test_temp_converter.rb)

The Code

The Results

How It Works

Hacking the Script

Chapter Recap

8. HTML and XML Tools

#30 Cleaning Up HTML (html_tidy.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#31 Counting Tags (xml_tag_counter.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#32 Extracting Text from XML (xml_text_extractor.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#33 Validating XML (xml_well_formedness_checker.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

Chapter Recap

9. More Complex Utilities and Tricks, Part I

#34 Finding Codes in the Bible or Moby-Dick (els_parser.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#35 Mutating Strings into Weasels (methinks.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

#36 Mutating the Mutation of Strings into Weasels (methinks_meta.rb)

The Code

How It Works

Running the Script

The Results

Hacking the Script

Chapter Recap

10. More Complex Utilities and Tricks, Part II

#37 Overnight DJ (radio_player1.rb)

The Code

How It Works

The Results

Hacking the Script

#38 Better Overnight DJ (radio_player2.rb)

The Code

How It Works

The Results

Hacking the Script

#39 Numbers by Name (to_lang.rb)

The Code

representable_in_english.rb

representable_in_spanish.rb

to_lang.rb

How It Works

The Two Mixins

The Main Code

The Results

Hacking the Script

#40 Elegant Maps and Injects (symbol.rb)

The Code

How It Works

The Results

Hacking the Script

Chapter Recap

11. CGI and the Web

Common Gateway Interface

Preparation and Installation

#41 A Simple CGI Script (simple_cgi.rb)

The Code

How It Works

The Results

Hacking the Script

#42 Mod Ruby (mod_ruby_demo.rhtml and mod_ruby_demo.conf)

The Code

mod_ruby_demo.conf

mod_ruby_demo.rhtml

How It Works

The Results

Hacking the Script

#43 CSS Stylesheets, Part I (stylesheet.rcss)

The Code

How It Works

The Results

Hacking the Script

#44 CSS Stylesheets, Part II (stylesheet2.rcss)

The Code

How It Works

The Results

Hacking the Script

Chapter Recap

12. RubyGems and Rails Preparation

RubyGems

Installing RubyGems

Using RubyGems

Listing Installed and Installable Gems

Installing Gems

Updating Gems

Learning More About RubyGems

Rails Preparation

What Is Rails?

Other Options for Installing Rails

Via Operating System Package Manager

From Source

Pre-Packaged

Databases

The Structure of a Rails Application

Generating a Rails Application

Viewing Your Rails Application

Basics for Generating Applications

Chapter Recap

13. A Simple Rails Project

Creating the Application

Initial Creation

Preparing the Database

Adding Data

Creating the Model and Controllers

Creating the Photo Model

Creating the Album and Feed Controllers

Dissecting the Application

Dissecting the Photo Model

Dissecting the Controllers

Dissecting the Album Controller

Dissecting the Application Controller

Dissecting the Feed Controller

Dissecting the Helpers

Dissecting the Album Helper

Dissecting the ApplicationHelper

Dissecting the FeedHelper

Dissecting the FooterHelper

Dissecting the Album Controller’s Views

Dissecting the index View

Dissecting the show View

Dissecting the Feed Controller’s images View

Dissecting the Album Controller’s Layout

Using CSS

Using the Application

Learning More About Rails

Chapter Recap

A. How Does Ruby Compare to Other Languages?

C

Haskell

Java

Lisp

Perl

PHP

Python

Smalltalk

Summary of Ruby vs. Other Languages

Index

About the Author

Colophon

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