Getting Started with Magento Extension Development. This practical guide to building Magento modules from scratch takes you step-by-step through the whole process, from first principles to practical development. At the end of it you'll have acquired expertise based on thorough understanding

Branko Ajzele

Modules, are a group of php and xml files meant to extend the system with new functionality, or override core system behavior. Most of the base Magento system is built using the module system, so you can see why they are an important feature for this rich open-source e-commerce solutions. This book explores key module development techniques and teaches you to modify, understand and structure your modules making it easy for you to get a strong foundation for clean and unobtrusive Magento module development.Getting Started with Magento Extension Development is a practical, hands-on guide to building Magento modules from scratch. This book provides an in depth introduction and helps you discover features such as; blocks, controllers, models, configuration files, and other crucial elements which contribute to the Magento architecture. This book introduces the you to real-world modules and helps provide a strong foundation which you need to become a professional Magento module developer. The book further explores best practices and tips and tricks offering you the ultimate go to guide.Getting Started with Magento Extension Development focuses on three areas. First you are guided through the entire Magento structure, where each important directory or file is explored in detail. Then the essence of the module structure and development is explained through the detailed coverage of models, blocks, controllers, configuration, and other files that manifest a single module. Finally, a detailed set of instructions is given for building four real-world modules, including a payment and shipping module.

vSphere High Performance Cookbook. A cookbook is the ideal way to learn a tool as complex as vSphere. Through experiencing the real-world recipes in this tutorial you'll gain deep insight into vSphere's unique attributes and reach a high level of proficiency

Prasenjit Sarkar, Prasenjit Sarkar

VMware vSphere is the key virtualization technology in today's market. vSphere is a complex tool and incorrect design and deployment can create performance-related problems. vSphere High Performance Cookbook is focused on solving those problems as well as providing best practices and performance-enhancing techniques.vSphere High Performance Cookbook offers a comprehensive understanding of the different components of vSphere and the interaction of these components with the physical layer which includes the CPU, memory, network, and storage. If you want to improve or troubleshoot vSphere performance then this book is for you!vSphere High Performance Cookbook will teach you how to tune and grow a VMware vSphere 5 infrastructure. This book focuses on tuning, optimizing, and scaling the infrastructure using the vSphere Client graphical user interface. This book will enable the reader with the knowledge, skills, and abilities to build and run a high-performing VMware vSphere virtual infrastructure.You will learn how to configure and manage ESXi CPU, memory, networking, and storage for sophisticated, enterprise-scale environments. You will also learn how to manage changes to the vSphere environment and optimize the performance of all vSphere components.This book also focuses on high value and often overlooked performance-related topics such as NUMA Aware CPU Scheduler, VMM Scheduler, Core Sharing, the Virtual Memory Reclamation technique, Checksum offloading, VM DirectPath I/O, queuing on storage array, command queuing, vCenter Server design, and virtual machine and application tuning.By the end of this book you will be able to identify, diagnose, and troubleshoot operational faults and critical performance issues in vSphere.

Bitcoin Essentials. Gain insights into Bitcoin, a cryptocurrency and a powerful technology, to optimize your Bitcoin mining techniques

Albert Szmigielski

Blockchain is being billed as the technology of the future. Bitcoin is the first application of that technology. Mining is what makes it all possible. Exploring mining from a practical perspective will help you make informed decisions about your mining setup. Understanding what the future may hold for blockchains, and therefore for mining, will help you position yourself to take advantage of the impending changes.This practical guide starts with an introduction to Bitcoin wallets, as well as mining hardware and software. You will move on to learn about different mining techniques using the CPU, GPU, FPGA, and ultimately the ASIC as an example. After this, you will gain an insight into solo mining and pool mining, and see the differences between the two. The book will then walk you through large-scale mining and the challenges faced during such operations. Finally, you will take a look into the future to see a world where blockchain-based applications are commonplace and mining is ubiquitous.

Simplify Testing with React Testing Library. Create maintainable tests using RTL that do not break with changes

Scottie Crump

React Testing Library (RTL) is a lightweight and easy-to-use tool for testing the document object model (DOM) output of components. This book will show you how to use this modern, user-friendly tool to test React components, reducing the risk that your application will not work as expected in production.The book demonstrates code snippets that will allow you to implement RTL easily, helping you to understand the guiding principles of the DOM Testing Library to write tests from the perspective of the user. You'll explore the advantages of testing components from the perspective of individuals who will actually use your components, and use test-driven development (TDD) to drive the process of writing tests. As you advance, you'll discover how to add RTL to React projects, test components using the Context API, and also learn how to write user interface (UI) end-to-end tests using the popular Cypress library. Throughout this book, you’ll work with practical examples and useful explanations to be able to confidently create tests that don't break when changes are made.By the end of this React book, you will have learned all you need to be able to test React components confidently.

Learning NServiceBus Sagas. Discover how to design, build, and test sagas and messaging with NServiceBus

Richard L Helton

Oracle Advanced PL/SQL Developer Professional Guide. Master advanced PL/SQL concepts along with plenty of example questions for 1Z0-146 examination with this book and

Saurabh K. Gupta

PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension language for SQL and the Oracle relational database. Server-side PL/SQL is stored and compiled in the Oracle Database and runs within the Oracle executable. With this guide Oracle developers can work towards accomplishing Oracle 11g Advanced PL/SQL Professional certification, which is the second milestone for developers working at the Associate level. The Oracle Advanced PL/SQL Developer Professional Guide helps you master advanced PL/SQL concepts. Besides the clear and precise explanation on advanced topics, it also contains example code and demonstrations, which gives a sense of application and usage to readers.The book gives a deep insight that will help transform readers from mid-level programmers to professional database developers. It aims to cover the advanced features of PL/SQL for designing and optimizing PL/SQL code.This book starts with an overview of PL/SQL as the programming database language and outlines the benefits and characteristics of the language. The book then covers the advanced features that include PL/SQL code writing using collections, tuning recommendations using result caching, implementing VPD to enforce row level security, and much more. Apart from programming, the book also dives deep into the usage of the development tool SQL Developer, employing best practices in database environments and safeguarding the vulnerable areas in PL/SQL code to avoid code injection.

Celtx: Open Source Screenwriting Beginner's Guide. Celtx won’t write your script for you, but it will ensure it has the format and features demanded by the film industry. Learn to use Celtx along with insider secrets of screenwriting and script-marketing into the bargain

Ralph Roberts, Celtx Project Paypal paypal@greyfirst.com

Hands-On Graph Analytics with Neo4j. Perform graph processing and visualization techniques using connected data across your enterprise

Estelle Scifo

Neo4j is a graph database that includes plugins to run complex graph algorithms.The book starts with an introduction to the basics of graph analytics, the Cypher query language, and graph architecture components, and helps you to understand why enterprises have started to adopt graph analytics within their organizations. You’ll find out how to implement Neo4j algorithms and techniques and explore various graph analytics methods to reveal complex relationships in your data. You’ll be able to implement graph analytics catering to different domains such as fraud detection, graph-based search, recommendation systems, social networking, and data management. You’ll also learn how to store data in graph databases and extract valuable insights from it. As you become well-versed with the techniques, you’ll discover graph machine learning in order to address simple to complex challenges using Neo4j. You will also understand how to use graph data in a machine learning model in order to make predictions based on your data. Finally, you’ll get to grips with structuring a web application for production using Neo4j.By the end of this book, you’ll not only be able to harness the power of graphs to handle a broad range of problem areas, but you’ll also have learned how to use Neo4j efficiently to identify complex relationships in your data.