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"Looking at the screen of my laptop, I realized that it was full of code that didn't let me understand what it did regarding business logic. From that moment I began to search until I discovered the architecture that decouples the business logic from the frameworks: Hexagonal Architecture, more correctly called Ports & Adapters. From that moment until now, I haven't stopped reading and learning about this pattern." Recommended by giants like Netflix and Amazon, the Hexagonal or Ports & Adapters architecture simplifies testing, protects against business logic leakage, supports changing technologies in long-running system, and lets you apply Domain Driven Design. In this definitive book on the subject, pattern author Dr. Alistair Cockburn and Juan Manuel Garrido de Paz lay bare all of the intricacies of the pattern, providing sample code and answering your many frequently asked questions. |
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The system design interview is considered to be the most complex and most difficult technical job interview by many. This book provides a step-by-step framework on how to tackle a system design question. It provides many examples to illustrate the systematic approach with detailed steps that you can follow. What’s inside? - An insider’s take on what interviewers really look for and why. - A 4-step framework for solving any system design interview question. - 15 real system design interview questions with detailed solutions. - 188 diagrams to visually explain how different systems work. Table Of Contents Chapter 1: Scale From Zero To Millions Of Users Chapter 2: Back-of-the-envelope Estimation Chapter 3: A Framework For System Design Interviews Chapter 4: Design A Rate Limiter Chapter 5: Design Consistent Hashing Chapter 6: Design A Key-value Store Chapter 7: Design A Unique Id Generator In Distributed Systems Chapter 8: Design A Url Shortener Chapter 9: Design A Web Crawler Chapter 10: Design A Notification System Chapter 11: Design A News Feed System Chapter 12: Design A Chat System Chapter 13: Design A Search Autocomplete System Chapter 14: Design Youtube Chapter 15: Design Google Drive Chapter 16: The Learning Continues |
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We all like to think we're pretty savvy when it comes to using our Macs, and in the case of the typical Macworld reader, that's usually true. But there's a funny thing we've noticed when we talk even to veteran Mac users: There's almost always some essential stuff—basic things that would make their Mac use easier or more efficient—that they've either forgotten or never learned.  So we got some Macworld editors and contributors together and asked: What are the things that every Mac user should know how to do? Not the really basic stuff—Command-C, Command-V, and so on—but the skills and knowledge that mark you as Mac-literate. After much pondering and discussion, we came up with a list of 100 items that fit the bill. Those skills run the gamut from startup to shutdown: they include smart ways to manage files and accounts, search, and customize your Mac.  We'll bet that you already know many of them. But we'll also bet that you don't know them all. And if you can really, honestly say that you knew every one, you're a whole lot savvier than any of us. |
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How do we make digital systems feel less robotic and more real? Whether you work with interface or visual design, front-end technology, or content design, learn why conversation is the best model for creating device-independent, human-centered systems. Research and information design expert Erika Hall explains what makes an interaction truly conversational and how to get more comfortable using language in design. From understanding the human interface, to effectively using the power of personality, to getting it all done, you’ll find out how the art of communication can elevate technology. |
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Even the most thought-out and best-planned user experience can get lost when attention to certain details falls short. To raise awareness for those little things that add up to an ideal user experience, we have put together "Designing Better UX". The practical approaches for designing better UX cover mobile apps, adaptive systems, and multi-screen experiences. The eBook is packed with in-depth tips and tricks shared by experts from the industry. They consider the importance of straightforward yet personal microcopy, explore the strengths and weaknesses of infinite scrolling, and take a look at how well-crafted feedback loops can influence a user's behavior. Once we decide to create a well-balanced experience, all of the covered aspects in this eBook have to be thoroughly considered, i.e. when is the user experience fostered and when is it curbed? If you've been looking for a valuable resource for your daily UX routine, you can now stop searching. TABLE OF CONTENTS - When You Shouldn't Use Fitt's Law To Measure User Experience - Five Ways To Prevent Bad Microcopy - Infinite Scrolling: Let's Get To The Bottom Of This - Designing Great Feedback Loops - Sketching For Better Mobile Experiences - Converting Our Stories Into Multi-Screen Experiences - Creating An Adaptive System To Enhance UX |
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Move on from phone snapshots and start making amazing images Canon EOS R50 For Dummies helps you create superior photo and video content, with step-by-step instructions for how to make the most of this advanced, interchangeable-lens digital camera. You’ll walk through the controls, interface, and accessories of the Canon EOS R50, and you’ll learn the basics of image-making, so you can take impressive shots, even if you’ve never taken a photography class. Let this Dummies guide be your teacher as you learn to take great action shots, stunning portraits, detailed closeups, low-light photos, and professional-looking video. Learn your way around the Canon EOS R50 and its settings and controls Get familiar with common photography terms and basic techniques Start shooting right away with user-friendly instructions on using automatic modes Go manual to adjust focus, color, sharpness, and more to get the look you’re after Photography hobbyists and content creators will love Canon EOS R50 For Dummies, the quick-start guide to the camera built for those looking for superior photo and video results. |
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"Mastering Data Structures and Algorithms in C and C++" is a comprehensive book that serves as a guide for programmers and computer science enthusiasts to learn and understand fundamental data structures and algorithms using the C and C++ programming languages. The book is designed to help readers gain proficiency in solving complex problems and optimizing their code. The book aims to provide readers with a deep understanding of fundamental data structures and algorithms using the C and C++ programming languages. The book is designed to cater to both beginners and experienced programmers. |
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★★★★★LEARNING STARTS WITH VIEWING THE WORLD DIFFERENTLY. ★★★★★ Knowledge flow - A mobile learning platform provides Apps and Books. Knowledge flow provides learning book of Data Structures and Algorithms . This book is for all information technology and computer science students and professionals across the world. Data structure is the programmatic way of storing data and this book of data structure provides an easy way to understanding data structure. Contents: Introduction to Data Structures and Algorithms, Data structure for string and pattern matching Algorithm, Arrays and Pointers, Linked Lists, Stacks and Queues, Trees, Graphs in Data Structure, Sort and Search,  AVL Search Trees, Warshall’s Algorithm. To find more education books, visit here http://knowledgeflow.in/books. |
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How to get the best Wi-Fi connectivity and security with the least amount of money and time.  Securing your privacy is at the center of this guide.  Wi-Fi is a two-way communication networking technology using 2.4 and 5 GHz radio bands. Without any precaution, anyone nearby can tune into. The best ways to get good Wi-Fi security and connectivity are simple and inexpensive turn-key solutions and even low-cost 'Do-It-Yourself' alternatives. |
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Learn how to code while you write programs that effortlessly perform useful feats of automation! The second edition of this international fan favorite includes a brand-new chapter on input validation, Gmail and Google Sheets automations, tips for updating CSV files, and more. If you've ever spent hours renaming files or updating spreadsheet cells, you know how tedious tasks like these can be. But what if you could have your computer do them for you? Automate the Boring Stuff with Python, 2nd Edition teaches even the technically uninclined how to write programs that do in minutes what would take hours to do by hand—no prior coding experience required! This new, fully revised edition of Al Sweigart’s bestselling Pythonic classic, Automate the Boring Stuff with Python , covers all the basics of Python 3 while exploring its rich library of modules for performing specific tasks, like scraping data off the Web, filling out forms, renaming files, organizing folders, sending email responses, and merging, splitting, or encrypting PDFs. There’s also a brand-new chapter on input validation, tutorials on automating Gmail and Google Sheets, tips on automatically updating CSV files, and other recent feats of automations that improve your efficiency. Detailed, step-by-step instructions walk you through each program, allowing you to create useful tools as you build out your programming skills, and updated practice projects at the end of each chapter challenge you to improve those programs and use your newfound skills to automate similar tasks. Boring tasks no longer have to take to get through—and neither does learning Python! |
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Les méthodes agiles  recouvrent un ensemble de pratiques qui peuvent s'appliquer à divers types de projets, mais se limitent plutôt actuellement aux projets de développement en informatique. Les méthodes agiles (esentiellement Scrum et XP abréviation de eXtreme Programming) se veulent plus pragmatiques que les méthodes traditionnelles. Elles impliquent au maximum le demandeur (client) et permettent une grande réactivité à ses demandes. L'idée maîtresse de ce livre est de pouvoir guider les organisations dans leur transition vers des méthodes agiles. Les avantages attendus sont la qualité du mogiciel produit, le "time to market", l'engagement des équipes et l'amélioration de leur productivité. |
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Recursion is an important topic in computing as it provides a simple yet elegant way of implementing complex solutions. An explanation of how recursion works is provided, together with a number of problems and their recursive solutions - using Java. Most, if not all are the same in C/C++ or, at the very least, require minor modification. Every problem presented demonstrates how to recognize a recursive solution - even in those cases where it is not apparent. |
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Are you interested in studying a new popular programming language? Do you know that Python is used in Google, Facebook and CERN? This e-book follows not only the didactic principles, but also encourages creativity and playfulness. The author has been teaching programming at a high school for 15 years. He organizes and lectures courses of programming in Python for teachers; he cooperates with the Faculty of Mathematics, Physics and Informatics of Comenius University in Bratislava as a teacher trainer. He actively cooperates in creating educational programs and textbook assessments. The author has used the experience gained teaching programming in different programming languages to create this e-book. The e-book is illustrative, containing many practical tasks using the graphic environment of the Tkinter library. Its content covers a basic programming course. We start by learning graphical shapes, and using a loop and conditions. Later we learn to react to mouse and keyboard events. Finally, we are able to create animations and simple games. The e-book contains a set of revision exercises and an example final test. |
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Before Rust, blockchain developers didn’t have a systems programming language that was type-safe, fast, and, at the same time, had stable and easy memory management. Rust proved to be a boon for developers and works as the perfect solution for not only blockchain and protocol development but also dApp development. Rust for Blockchain Application Development focuses on demonstrating solutions that can help blockchain developers productize decentralized applications using Rust, which is a complex language with a steep learning curve. This book starts with basic Rust language concepts and then builds on these concepts to enable you to develop your own blockchain from scratch. As you progress, you’ll learn how to build dApps on popular chains like Solana and NEAR. You’ll also be guided through creating Ethereum dApps using Foundry (Rust). Finally, you’ll develop a custom blockchain using Substrate by Parity (Polkadot). The book provides a complete 360-degree view of Rust in the blockchain ecosystem. By the end of this Rust book, you’ll have a thorough understanding of how to apply your Rust knowledge to building dApps and blockchains from scratch. |
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Ruby is one of the most important programming languages in use for web development. It powers the Rails framework, which is the backing of some of the most important sites on the web. The Pickaxe Book, named for the tool on the cover, is the definitive reference on Ruby, a highly-regarded, fully object-oriented programming language. This updated edition is a comprehensive reference on the language itself, with a tutorial on the most important features of Ruby - including pattern matching and Ractors - and describes the language through Ruby 3.3. Would you like to go from first idea to working code much, much faster? Do you currently spend more time satisfying the compiler instead of your clients or end users? Are you frustrated with demanding languages that seem to get in your way instead of helping you get the work done? Are you using Rails and want to dig deeper into the underlying Ruby language? If so, then we've got a language and book for you! Ruby is a fully object-oriented language. The combination of the power of a pure object-oriented language with the convenience of a scripting language makes Ruby a favorite tool of programmers that want to get things done quickly and cleanly. This comprehensive reference manual for Ruby includes a description of the most important standard library modules, built-in classes, and modules. It also includes all the new and changed syntax and semantics introduced through Ruby 3.3, including pattern matching and Ractors, and describes the language through Ruby 3.3. What You Need: This book assumes you have a basic understanding of object-oriented programming. In general, Ruby programmers tend to favor the the command line for running their code, and they tend to use text editors rather than IDEs. Ruby runs on Windows, Linux, and MacOS. |
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C++ is a general-purpose programming language which has evolved over the years and is used to develop software for many different sectors. This book will be your companion as it takes you through implementing classic data structures and algorithms to help you get up and running as a confident C++ programmer. We begin with an introduction to C++ data structures and algorithms while also covering essential language constructs. Next, we will see how to store data using linked lists, arrays, stacks, and queues. Then, we will learn how to implement different sorting algorithms, such as quick sort and heap sort. Along with these, we will dive into searching algorithms such as linear search, binary search and more. Our next mission will be to attain high performance by implementing algorithms to string datatypes and implementing hash structures in algorithm design. We'll also analyze Brute Force algorithms, Greedy algorithms, and more. By the end of the book, you'll know how to build components that are easy to understand, debug, and use in different applications. |
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Teaching you everything you need to know about iCloud, Apple's revolutionary back-up and sync service, iCloud for Beginners guides you through every essential element. From how to set-up your free iCloud account to sharing your information across your Apple devices, these easy-to-follow guides and step-by-step tutorials will show you exactly how to get the most out of your iPad, iPhone and Mac. Designed by experts as an accessible, friendly guide to world-beating software and devices, the For Beginners series will help give you the confidence to learn everything you need to know. Clear, easy-to-understand and comprehensive, For Beginners’ first class tutorials, features and reviews are created with you in mind, ready to give you the tools you need to get the most out of your new passion. |
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Hello iPad Tips & Tricks shows you over 50 iPad secrets only iPad pros know. Did you know: • In the Camera app, you can take a picture by pressing the volume up button? • In Mail, to see your drafts, you can hold down the Compose new message button? • You can get Emoji on your iPad keyboard? There are tons of great features you'll discover and love your iPad even more. |
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The iPad mini is even more portable than its older sibling, fitting neatly in a bag and comfortably in just one hand. Apple’s smaller tablet does not compromise on features, however, and is the ideal device for communication, entertainment, productivity and more. Discover everything it has to offer in this book. Designed by experts as an accessible, friendly guide to world-beating software and devices, the For Beginners series will help give you the confidence to learn everything you need to know. Clear, easy-to-understand and comprehensive, For Beginners’ first class tutorials, features and reviews are created with you in mind, ready to give you the tools you need to get the most out of your new passion. |
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While using an iOS device isn’t hard—and that's partially why we love them—even savvy users like Macworld readers have holes in their iPhone and iPad knowledge. Maybe you know everything there is to know about Safari caching, but you're in the dark when it comes to iPhone photography. Or perhaps you're a Mail maestro, but you'd like to be faster at composing emails on a digital keyboard. Whether you've forgotten an iOS trick or you want to learn some new ones, our editors have you covered. We polled our community—and our newsroom—to create a list of 12 essential iOS features we think every iOS user should know about. Topics include syncing your accounts and data, managing your apps, printing, and working with Bluetooth. You can learn how to troubleshoot meddlesome battery issues and brush up on your security and backup options; we'll also explain the basics of multitasking and editing text, and walk you through shooting a quality photo and working with PDFs. These iOS essentials first appeared as the cover story for our April 2012 issue; not only does the book include all the information from that print feature, we've redesigned the layout, included new galleries and videos, and added a little bit extra for our ebook viewers.  |
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" iOS 7 is completely redesigned with an entirely new user interface and over 200 new features, so it's like getting a brand new device."  We went through all of the 200 features and picked the best ones to show you. We also included legacy tricks as well.  Almost every single tip has a video a accompany it so you can see it in action. Be the first to know all the cool things you can do in iOS 7! Check us out at helloiat.com for more books and apps. |
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iOS 5 has hit the stage, and eager users everywhere are getting ready to upgrade their devices. If you’re concerned about the upgrade process, or simply want to know all your setup options before making the big switch, let the editors at Macworld help you upgrade your iPhone, iPod touch, or iPad to iOS 5 with this step-by-step guide. After you've set up your device, we'll walk you through the mysteries of iCloud, introduce you to each of iOS 5's marquee features, and uncover hidden gems within apps. |
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The Handy Tips Guide ™ to the iPad is quite simply one of the most comprehensive illustrated tips book available anywhere for the iPad. This brand new edition has been fully revised, expanded and updated and covers iOS 8 in depth. Jump in, discover its secrets now. The Handy Tips Guide ™ is the book equivalent of an expert friend. It gives you a helpful hand the minute you ask for it. A truly exceptional guide, each chapter is filled with gold nuggets of tips, succinct and to the point. Presented in a logical order that allows you to jump to any page you want, precisely when you need it, giving you answers, fast. There are an indulgent amount of high definition screenshots that complement the clear and concise writing to help you better understand.  A wonderful feature of The Handy Tips Guide™ is that you can pinch-apart the images so they expand for a more detailed view, and pinch-together or press the X to return to normal book view.  The team behind The Handy Tips Guide™ understands that iPad users have different levels of familiarity with the iPad, there are foundation tips for complete beginners, and advanced tips for those who are experts but want to truly get the most out of their iPad user experience. Download the free sample. Featuring over 200 independently researched and tested feature explanations this is the book that experts can learn from. With intuitive presentation and a truly comprehensive range of tips The Handy Tips Guide ™ will empower you to get the very most out of your iPad. Just some of the things you can discover:  - Secret Keyboard Controls  - Time Saving Punctuation  - Siri  - Set the orientation lock  - Opening, closing, moving, renaming, deleting folders  - Installing, pausing, organizing and deleting apps  - Use Multitasking to switch between open apps  - Using Bluetooth with your iPad  - Prioritise Wi-Fi signal over 3G /4G - Track your data usage  - Group emails by thread  - Search, archive and delete emails  - Share your email inbox between multiple email accounts  - Add contacts, add contact photos, share contacts  - Saving images from the internet  - Search a webpage  - Change Safari's default search engine  - How to protect your internet browsing history  - How to focus on a subject when using the inbuilt camera  - Use Maps app to see where photos were taken, or where contacts live  - Use Maps, check traffic conditions.  - Use your iPad as a digital picture frame  - View and hide photos with a pinch  - Use other apps whilst using FaceTime  - Have fun with Photo Booth  - How to set-up and use FaceTime and improve call quality  - Show Music controls when using other apps  - Speed up, slow down, or replay the last 30 seconds of a podcast  - Browse an album's tracklist  - Game Center, see your worldwide ranking, play multiplayer games  - Calendar. How to navigate it and view birthdays.  - Notes. How to save and sync notes.  - Security. Secure your iPad. Erase all data.  - How to locate a lost or stolen iPad.  - Use AirPlay to stream media from your iPad  - Video Mirroring, output your iPad to your HDTV  - Use your iPad with your Apple TV - Accessibility features.  - How to back-up and restore your iPad  - Troubleshooting |
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As the iPad continues to develop, it can be a challenge to keep up with its new releases and impressive features.  Revolutionary developments introduced by iOS 5 and the new iPad mean it’s often difficult to know where to start. The 101 Essential iPad Tips & Tricks is here to make your life a little easier, by selecting the very best hints to extend the functionality of your tablet. Featuring Apple and third-party apps, this comprehensive guide will allow you to easily and quickly transform your device into something special. Written by experts for readers dedicated to getting the most from their products, Tips & Tricks is a series that provides world-beating advice to experienced consumers, offering a variety of intermediate to advanced tutorials and stylish, cutting-edge features. In-depth yet accessible, the Tips & Tricks series offers a comprehensive solution unlike any other. |
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In this "intriguing, insightful and extremely educational" novel, the world's most famous hacker teaches you easy cloaking and counter-measures for citizens and consumers in the age of Big Brother and Big Data (Frank W. Abagnale). Kevin Mitnick was the most elusive computer break-in artist in history. He accessed computers and networks at the world's biggest companies -- and no matter how fast the authorities were, Mitnick was faster, sprinting through phone switches, computer systems, and cellular networks. As the FBI's net finally began to tighten, Mitnick went on the run, engaging in an increasingly sophisticated game of hide-and-seek that escalated through false identities, a host of cities, and plenty of close shaves, to an ultimate showdown with the Feds, who would stop at nothing to bring him down. Ghost in the Wires is a thrilling true story of intrigue, suspense, and unbelievable escapes -- and a portrait of a visionary who forced the authorities to rethink the way they pursued him, and forced companies to rethink the way they protect their most sensitive information. "Mitnick manages to make breaking computer code sound as action-packed as robbing a bank." -- NPR |
