Rails Test Prescriptions (Pragmatic Programmers)

By Noel Rappin

Rails try out Prescriptions is a complete advisor to trying out Rails purposes, masking Test-Driven improvement from either a theoretical point of view (why to check) and from a pragmatic point of view (how to check effectively). It covers the center Rails checking out instruments and methods for Rails 2 and Rails three, and introduces well known components, together with Cucumber, Shoulda, Machinist, Mocha, and Rcov.

Your Ruby on Rails program is ill. it has got insects. not anyone recollects what that tough piece of code used to be presupposed to do, and no-one can inform what it really does. time cut-off dates are looming, yet each time you are making the slightest swap to the code, anything else breaks.

you would like Test-Driven improvement (TDD), a confirmed technique for bettering the layout, maintainability, and long term viability of software program. In TDD, the checks come first, after which code is written to check the expectancy of the try. utilizing TDD potential writing higher code faster.

Ruby on Rails has remarkable help for TDD. as well as the instruments that Rails has integrated, a wide and thriving checking out neighborhood provides new instruments at an accelerating cost. Rails attempt Prescriptions is your advisor to the full Rails checking out ecosystem.

Containing either functional code examples and dialogue of why trying out works, this publication starts off with the main simple positive factors brought as a part of middle Ruby on Rails. as soon as you have got built-in these gains into your coding perform, you want to use well known third-party trying out instruments equivalent to RSpec, Shoulda, Cucumber, manufacturing facility lady, and Rcov. Rails attempt Prescriptions will enable you use those instruments and once they are acceptable. Rails attempt Prescriptions will hide either the present Rails 2.3.x model in addition to the preliminary 3.0 release.

while you're a Rails programmer who exams code, this ebook is a useful consultant to the newest in on hand checking out instruments. while you're a Rails programmer who does not try code, then commence checking out instantly: this publication can help.

Show description

Read More

Learn Cocoa on the Mac

By Jack Nutting, Peter Clark

The Cocoa frameworks are one of the most robust for growing local OS X apps on hand this day. even though, for a first-time Mac developer, simply firing up Xcode four and beginning to browse the documentation could be a daunting and tricky activity. The Objective-C category reference documentation by myself could fill millions of revealed pages, let alone all of the different tutorials and courses integrated with Xcode. the place do you begin? Which sessions are you going to want to take advantage of? How do you utilize Xcode and the remainder of the instruments?

Learn Cocoa for the Mac, moment variation, completely revised for OS X Mountain Lion and XCode 4, solutions those questions and extra, supporting you discover your manner during the jungle of periods, instruments, and new techniques that you can start at the subsequent nice OS X app this present day. Jack Nutting and Peter Clark are your courses via this woodland; Jack and Peter have lived the following for years, and should convey you which ones boulder to push, which vine to cut, and which move to drift throughout which will make it via. you are going to examine not just tips on how to use the parts of this wealthy framework, but additionally which ones healthy jointly, and why.

Jack Nutting’s technique, combining pragmatic problem-solving with a deep admire for the underlying layout philosophies contained inside Cocoa, stems from years of expertise utilizing those frameworks. Peter Clark will express you which of them elements of your app require you to leap in and code an answer, and which components are top served by way of letting Cocoa take you the place it wishes you to head. the trail over what seems like a mountain of elements and APIs hasn't ever been extra completely ready to your travels. In each one bankruptcy, you’ll construct an app that explores a number of parts of the Cocoa panorama. With Jack’s and Peter's advice, the steep studying curve turns into a gratifying event. there's nonetheless a lot paintings for the uninitiated, yet by the point you’re performed, you can be good in your method to changing into a Cocoa master.

Show description

Read More

Beginning C# 5.0 Databases (Expert's Voice in C#)

By Vidya Vrat Agarwal

Assuming simply simple wisdom of C#, Beginning C# 5.0 Databases teaches the entire basics of database expertise and database programming readers have to speedy develop into hugely knowledgeable database clients and alertness developers.

A entire educational on either SQL Server 2012 and visible Studio 2012, Beginning C# 5.0 Databases explains and demonstrates numerous recommendations and how one can construct a database software utilizing T–SQL and C#. jam-packed with sensible, distinctive examples, it’s been absolutely revised and up to date for Winforms utilizing C# 5.0 and visible Studio 2012 and gives the main entire, distinct, and mild creation to database know-how for all C# programmers at any point of experience.

  • Comprehensively and concisely explains primary database thoughts and database programming options
  • Rich in step by step operating examples of either T–SQL and C# courses
  • Covers the entire positive factors ADO.NET so much database programming ever calls for

Show description

Read More

Android Database Programming

By Jason Wei

Make the most the facility of data-centric and data-driven Android functions with this useful instructional grasp the abilities to construct data-centric Android functions transcend simply code by means of tough your self to contemplate sensible use-cases with SQLite and others concentrate on flushing out excessive point layout options, sooner than drilling down into assorted code examples intimately we are living in an more and more data-centric and data-driven global. On best of that we are living in a truly mobile-centric global with the increase of Android shrewdpermanent telephones and capsule units and the surge well-liked for the Android platform. in addition to the call for for extra info, there's a call for for effective, "snappy" functions, and so builders should have a powerful realizing of while various info garage tools are acceptable and once they will not be. learning find out how to use those fields to effectively create a strong program may also help you enhance your wisdom and talents during this zone. "Android Database Programming" is designed to assist builders create and layout data-centric cellular purposes on Google's Android platform. because the international is going more and more cellular and as shoppers' call for for data-centric functions rises, figuring out easy methods to mix the 2 successfully turns into an more and more very important asset to have as a developer. The publication begins via many of the neighborhood facts garage tools on Android, and finishes off by means of reading exterior databases and methods you could make the most of them from inside of an Android program. This publication starts off by way of neighborhood facts garage tools, targeting writing SQLite databases on your program and likewise how one can bind those databases to the person interface. The ebook, via its sensible process, strives to coach you through examples. every one bankruptcy makes a speciality of flushing out excessive point layout techniques, sooner than drilling down into varied code examples. As you proceed you'll examine exterior databases

Show description

Read More

P, NP, and NP-Completeness: The Basics of Computational Complexity

By Oded Goldreich

The point of interest of this publication is the P-versus-NP query and the speculation of NP-completeness. It additionally presents sufficient preliminaries concerning computational difficulties and computational versions. The P-versus-NP query asks even if discovering ideas is more durable than checking the correctness of suggestions. an alternate formula asks even if getting to know proofs is tougher than verifying their correctness. it truly is generally believed that the reply to those similar formulations is optimistic, and this can be captured via announcing that P isn't like NP. even though the P-versus-NP query is still unresolved, the speculation of NP-completeness deals proof for the intractability of particular difficulties in NP by way of exhibiting that they're common for the total type. Amazingly adequate, NP-complete difficulties exist, and moreover hundreds of thousands of ordinary computational difficulties bobbing up in lots of varied parts of arithmetic and technology are NP-complete.

Show description

Read More

Perl & LWP

By Sean M. Burke

Perl soared to attractiveness as a language for developing and coping with web pages, yet with LWP (Library for WWW in Perl), Perl is both adept at eating info on the net. LWP is a collection of modules for fetching and processing internet pages.The internet is an unlimited facts resource that comprises every little thing from inventory costs to motion picture credit, and with LWP all that information is simply a number of strains of code away. whatever you do on the internet, no matter if it is paying for or promoting, examining or writing, importing or downloading, information to e-commerce, might be managed with Perl and LWP. you could automate Web-based buy orders as simply as you could organize a software to obtain MP3 documents from an internet site.Perl & LWP covers:

  • Understanding LWP and its design
  • Fetching and interpreting URLs
  • Extracting info from HTML utilizing ordinary expressions and tokens
  • Working with the constitution of HTML records utilizing trees
  • Setting and examining HTTP headers and reaction codes
  • Managing cookies
  • Accessing info that calls for authentication
  • Extracting links
  • Cooperating with proxy caches
  • Writing internet spiders (also often called robots) in a secure fashion

Perl & LWP contains many step by step examples that express the best way to follow a few of the ideas. courses to extract info from the net websites of BBC information, Altavista, ABEBooks.com, and the elements Underground, to call quite a few, are defined intimately, so you know how and why they work.Perl programmers who are looking to automate and mine the net can choose up this ebook and be instantly effective. Written by means of a contributor to LWP, and with a foreword by way of one in every of LWP's creators, Perl & LWP is the authoritative consultant to this strong and well known toolkit.

Show description

Read More

MongoDB Cookbook - Second Edition

By Amol Nayak

Harness the most recent good points of MongoDB three with this choice of eighty recipes – from handling cloud structures to app improvement, this e-book is a crucial resource

About This Book

  • Get to grips with the newest good points of MongoDB 3
  • Interact with the MongoDB server and practice quite a lot of question operations from the shell
  • From management to automation, this cookbook retains you brand new with the world's prime NoSQL database

Who This publication Is For

This e-book is engineered for someone who's attracted to coping with info in a simple and effective means utilizing MongoDB. you don't need any previous wisdom of MongoDB, however it will be invaluable when you have a few programming adventure in both Java or Python.

What you'll Learn

  • Install, configure, and administer MongoDB sharded clusters and duplicate sets
  • Begin writing functions utilizing MongoDB in Java and Python languages
  • Initialize the server in 3 assorted modes with a variety of configurations
  • Perform cloud deployment and introduce PaaS for Mongo
  • Discover frameworks and items equipped to enhance developer productiveness utilizing Mongo
  • Take an in-depth examine the Mongo programming motive force APIs in Java and Python
  • Set up company category tracking and backups of MongoDB

In Detail

MongoDB is a high-performance and feature-rich NoSQL database that types the spine of the platforms that strength many alternative companies – it is easy to work out why it is the most well-liked NoSQL database out there. full of many gains that experience develop into crucial for lots of forms of software program pros and exceptionally effortless to exploit, this cookbook comprises many recommendations to the standard demanding situations of MongoDB, in addition to suggestions on powerful ideas to increase your talents and capabilities.

This e-book begins with the best way to initialize the server in 3 assorted modes with a variety of configurations. you are going to then be brought to programming language drivers in either Java and Python. a brand new characteristic in MongoDB three is that you should hook up with a unmarried node utilizing Python, set to make MongoDB much more well-liked by somebody operating with Python. you are going to then study a number additional issues together with complex question operations, tracking and backup utilizing MMS, in addition to a few very helpful management recipes together with SCRAM-SHA-1 Authentication. past that, additionally, you will locate recipes on cloud deployment, together with assistance on how one can paintings with Docker boxes along MongoDB, integrating the database with Hadoop, and counsel for bettering developer productivity.

Created as either an available educational and a simple to exploit source, available everytime you have to remedy an issue, MongoDB Cookbook may also help you deal with every thing from management to automation with MongoDB extra successfully than ever before.

Style and approach

Every recipe is defined in a very easy set-by-step demeanour but is very comprehensive.

Show description

Read More

Introducing Regular Expressions

By Michael Fitzgerald


154 pages, yet over 6MB.. textual content is searchable although there are a variety of photos from terminals.


If you’re a programmer new to average expressions, this easy-to-follow consultant is a brilliant position to begin. You’ll examine the basics step by step with assistance from quite a few examples, learning first-hand the best way to fit, extract, and rework textual content through matching particular phrases, characters, and patterns.

Regular expressions are a necessary a part of a programmer’s toolkit, on hand in a number of Unix utlilities in addition to programming languages comparable to Perl, Java, JavaScript, and C#. while you’ve comprehensive this e-book, you’ll be acquainted with the main regular syntax in typical expressions, and you’ll know how utilizing them will prevent huge time.
* detect what normal expressions are and the way they paintings
* research a few of the adjustments among average expressions used with command-line instruments and in a number of programming languages
* practice easy equipment for locating styles in textual content, together with digits, letters, Unicode characters, and string literals
* methods to use zero-width assertions and lookarounds
* paintings with teams, backreferences, personality periods, and quantifiers
* Use average expressions to mark up undeniable textual content with HTML5

Show description

Read More

Game Programming Patterns

By Robert Nystrom

The greatest problem dealing with many online game programmers is finishing their video game. such a lot video game initiatives fizzle out, crushed by way of the complexity in their personal code. online game Programming styles tackles that specific challenge. in accordance with years of expertise in shipped AAA titles, this ebook collects confirmed styles to untangle and optimize your video game, prepared as self sufficient recipes so that you can decide simply the styles you need.

You will the best way to write a powerful video game loop, how one can arrange your entities utilizing parts, and benefit from the CPUs cache to enhance your functionality. you will dive deep into how scripting engines encode habit, how quadtrees and different spatial walls optimize your engine, and the way different vintage layout styles can be utilized in games.

Show description

Read More

Rails 4 Test Prescriptions: Build a Healthy Codebase

By Noel Rappin

Does your Rails code be afflicted by bloat, brittleness, or inaccuracy? remedy those issues of a standard dose of test-driven improvement. Rails four try out Prescriptions is a accomplished consultant to how exams can help layout and write greater Rails purposes. during this thoroughly revised version, you are going to research why trying out works and the way to check successfully utilizing Rails four, Minitest five, and RSpec three, in addition to renowned checking out libraries reminiscent of factory_girl and Cucumber. Do what the general practitioner ordered to make your purposes think all higher. unwanted side effects could contain larger code, fewer insects, and happier developers.

Your Ruby on Rails software is in poor health. closing dates are looming, yet whenever you are making the slightest switch to the code, anything else breaks. no one recollects what that tough piece of code was once presupposed to do, and no-one can inform what it truly does. Plus, it has insects. you wish test-driven improvement, a procedure for making improvements to the layout, maintainability, and long term viability of software.

Containing either useful code examples and dialogue of why trying out works, this ebook begins with the main uncomplicated positive aspects added as a part of middle Ruby on Rails. as soon as you have built-in these positive factors into your coding perform, you are going to use renowned third-party checking out instruments equivalent to RSpec, Mocha, Cucumber, and factory_girl. you are going to attempt the part elements of a Rails software, together with the back-end version good judgment and the front-end demonstrate good judgment. utilizing Rails examples, you are going to how one can use trying out to let your code to reply greater to destiny switch. Plus, you will see how you can deal with real-world checking out situations.

This thoroughly revised version encompasses a new educational, in addition to new examples in the course of the booklet. Many chapters, together with the JavaScript bankruptcy, have passed through significant alterations to mirror new instruments and new practices. And there are fresh chapters on trying out for defense, and trying out exterior services.

What You Need:Ruby 2.1, Rails 4

Show description

Read More