Don't accept the compromise between fast & beautiful you can have it all Phoenix creator Chris Mc Cord Elixir creator Jose Valim & award-winning author Bruce Tate walk you through building an application that's fast & reliable At every step you'll learn from the Phoenix creators not just what to do but why ...

Don't accept the compromise between fast & beautiful you can have it all Phoenix creator Chris Mc Cord Elixir creator Jose Valim & award-winning author Bruce Tate walk you through building an application that's fast & reliable At every step you'll learn from the Phoenix creators not just what to do but why Packed with insider insights this definitive guide will be your constant companion in your journey from Phoenix novice to expert as you build the next generation of web applications Phoenix is the long-awaited web framework based on Elixir the highly concurrent language that combines a beautiful syntax with rich metaprogramming The authors who developed the earliest production Phoenix applications will show you how to create code that's easier to write test understand & maintain The best way to learn Phoenix is to code & you'll get to attack some interesting problems Start working with controllers views & templates within the first few pages Build an in-memory repository & then back it with an Ecto database layer Learn to use change sets & constraints that keep readers informed & your database integrity intact Craft your own interactive application based on the channels API for the real-time high-performance applications that this ecosystem made famous Write your own authentication components called plugs & even learn to use the OTP layer for monitored reliable services Organize your code with umbrella projects so you can keep your applications modular & easy to maintain This is a book by developers & for developers & we know how to help you ramp up quickly Any book can tell you what to do When you've finished this one you'll also know why to do it What You Need To work through this book you will need a computer capable of running Erlang 17 or better Elixir 11 or better Phoenix 10 or better & Ecto 10 or better A rudimentary knowledge of Elixir is also highly recommended ...

Want to develop novel robot applications but don't know how to write a mapping or object recognition system? You're not alone but you're certainly not without help By combining real-world examples with valuable knowledge from the Robot Operating System (ROS) community this practical book provides motivating recipes for solving specific robotics use cases Ideal for enthusiasts from students in robotics clubs to professional robotics scientists & engineers each recipe describes a complete solution using ROS open source libraries & tools You'll learn how to complete tasks described in the recipes as well as how to configure & recombine components for other tasks If you're familiar with Python you're ready to go Learn fundamentals including key ROS concepts tools & patterns Program robots that perform an increasingly complex set of behaviors using the powerful packages in ROS See how to easily add perception & navigation abilities to your robots Integrate your own sensors actuators software libraries & even a whole robot into the ROS ecosystem Learn tips & tricks for using ROS tools & community resources debugging robot behavior & using C in ROS ...

Rust is a new systems programming language that combines the performance & low-level control of C & C with memory safety & thread safety Rust's modern flexible types ensure your program is free of null pointer dereferences double frees dangling pointers & similar bugs all at compile time without runtime overhead In multi-threaded code Rust catches data races at compile time making concurrency much easier to use Written by two experienced systems programmers this book explains how Rust manages to bridge the gap between performance & safety & how you can take advantage of it Topics include How Rust represents values in memory (with diagrams) Complete explanations of ownership moves borrows & lifetimes Cargo rustdoc unit tests & how to publish your code on cratesio Rust's public package repository High-level features like generic code closures collections & iterators that make Rust productive & flexible Concurrency in Rust threads mutexes channels & atomics all much safer to use than in C or C Unsafe code & how to preserve the integrity of ordinary code that uses it Extended examples illustrating how pieces of the language fit together ...

This is the only comprehensive authoritative guide to building Conversational User Interfaces (CUI aka bots chatbots or chatterbots) with the Microsoft Bot Framework Reflecting the next radical revolution in human-computer interaction it will help you leverage advanced artificial intelligence (AI) & natural language processing to empower new & existing applications with stunningly intuitive conversational interfaces Long-time Microsoft MVP Joe Mayo begins with high-level explanations of what Microsoft Bot Framework is what you can do with it & why it matters so much Next he presents the foundational knowledge you need to start creating real bots & CUIs Step by step you'll learn how to build message dialogs manage conversations interact with framework APIs & incorporate powerful natural language processing with Microsoft's advanced Language Understanding Intelligent Service (LUIS) Mayo also offers detailed guidance on deploying your customized bots to key platforms such as Slack Skype & Facebook Messenger Throughout Mayo's practical examples combine code with clear explanations of when & why you would perform each task From start to finish Programming the Microsoft Bot Framework is relentlessly practical helping you translate the advanced magic of intelligent bots into real solutions right now ...

It's an exciting time to get involved with Micro Python the re-implementation of Python 3 for microcontrollers & embedded systems This practical guide delivers the knowledge you need to roll up your sleeves & create exceptional embedded projects with this lean & efficient programming language If you're familiar with Python as a programmer educator or maker you're ready to learn-and have fun along the way Author Nicholas Tollervey takes you on a journey from first steps to advanced projects You'll explore the types of devices that run Micro Python & examine how the language uses & interacts with hardware to process input connect to the outside world communicate wirelessly make sounds & music & drive robotics projects Work with Micro Python on four typical devices Py Board the microbit Adafruit's Circuit Playground Express & ESP8266ESP32 boards Explore a framework that helps you generate evaluate & evolve embedded projects that solve real problems Dive into practical Micro Python examples visual feedback input & sensing GPIO networking sound & music & robotics Learn how idiomatic Micro Python helps you express a lot with the minimum of resources Take the next step by getting involved with the Python community ...

Progress to Edexcel AS Mathematics Workbook is your stepping stone to starting the AS Mathematics course with complete confidence Work through this write-on workbook unit by unit to cover the key algebra you need to bridge successfully from GCSE to AS Mathematics ...

A Book of the Year for The Economist & the Observer Our world seems to be collapsing The daily news cycle reports the deterioration divisive politics across the Western world racism poverty war inequality hunger While politicians journalists & activists from all sides talk about the damage done Johan Norberg offers an illuminating & heartening analysis of just how far we have come in tackling the greatest problems facing humanity In the face of fear-mongering darkness & division the facts are unequivocal the golden age is now ...

Progressive Skills in English 4 Course Book Do you need English in your studies? Then you need the Progressive Skills in English Course The course builds the skills required for lectures tutorials reading research & written assignments in English Now with fantastic extensive online resources at ...

Please note this is a region B Blu-ray & will require a region B or region free Blu-ray player in order to play As a group of friends discover plans for a time machine they build it & use it to fix their problems & personal gain But as the future falls apart with disasters & each of them disappear little by little they must travel back to the past to make sure they never invent the machine or face the destruction of humanity ...