clojure high performance jvm programming

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Clojure High Performance Jvm Programming

Author : Eduardo Diaz
ISBN : 9781787288010
Genre : Computers
File Size : 58. 78 MB
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Explore the world of lightning fast Clojure apps with asynchronous channels, logic, reactive programming, and more About This Book Discover Clojure's features and advantages and use them in your existing projects Explore lesser-known and more advanced features, constructs, and methodologies such as asynchronous channels, actors, logic programming, and reactive programming Measure and monitor performance, and understand optimization techniques Who This Book Is For If you're looking to learn more about its core libraries and delve into the Clojure language in detail, then this book is ideal for you. Prior knowledge of the Clojure language is required. What You Will Learn Understand tools for the Clojure world and how they relate to Java tools and standards (such as Maven) Write simple multicore programs using Clojure's core concepts, such as atoms, agents, and refs Get to grips with Clojure's concurrency and state-management primitives in depth Analyze latency using the Criterium library Avoid reflection and boxing with type hints Maximize the impact of parallelization, functional composition, and process transformation by composing reducers and transducers Modify and add features to the Clojure language using macros Test your code with unit tests, specs, and type checks to write testable code Troubleshoot and style your Clojure code to make it more maintainable In Detail Clojure is a general-purpose language from the Lisp family with an emphasis on functional programming. It has some interesting concepts and features such as immutability, gradual typing, thread-safe concurrency primitives, and macro-based metaprogramming, which makes it a great choice to create modern, performant, and scalable applications. This learning path aims at unleashing the true potential of the Clojure language so you can use it in your projects. It begins with installing and setting up the Clojure environment before moving on to explore the language in depth. You'll get acquainted with its various features such as functional programming, concurrency, reducers, transducers, core.async and core.logic, and so on with a great level of detail. Moving on, you'll also learn how to enhance performance using Java interoperability and JVM-specific features from Clojure; you'll even master language features such as asynchronous channels, actors, logic programming, reactive programming, metaprogramming, and so on. This learning path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: Clojure for Java Developers by Eduardo Diaz Clojure High Performance Programming, Second Edition by Shantanu Kumar Mastering Clojure by Akhil Wali Style and approach This is an easy-to-follow, step-by-step guide to start writing Clojure programs, making use of all of its varied features and advantages.

Clojure High Performance Programming

Author : Shantanu Kumar
ISBN : 9781785287671
Genre : Computers
File Size : 25. 89 MB
Format : PDF, ePub
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Become an expert at writing fast and high performant code in Clojure 1.7.0 About This Book Enhance code performance by using appropriate Clojure features Improve the efficiency of applications and plan their deployment A hands-on guide to designing Clojure programs to get the best performance Who This Book Is For This book is intended for intermediate Clojure developers who are looking to get a good grip on achieving optimum performance. Having a basic knowledge of Java would be helpful. What You Will Learn Identify performance issues in Clojure programs using different profiling tools Master techniques to achieve numerical performance in Clojure Use Criterium library to measure latency of Clojure expressions Exploit Java features in Clojure code to enhance performance Avoid reflection and boxing with type hints Understand Clojure's concurrency and state-management primitives in depth Measure and monitor performance, and understand optimization techniques In Detail Clojure treats code as data and has a macro system. It focuses on programming with immutable values and explicit progression-of-time constructs, which are intended to facilitate the development of more robust programs, particularly multithreaded ones. It is built with performance, pragmatism, and simplicity in mind. Like most general purpose languages, various Clojure features have different performance characteristics that one should know in order to write high performance code. This book shows you how to evaluate the performance implications of various Clojure abstractions, discover their underpinnings, and apply the right approach for optimum performance in real-world programs. It starts by helping you classify various use cases and the need for them with respect to performance and analysis of various performance aspects. You will also learn the performance vocabulary that experts use throughout the world and discover various Clojure data structures, abstractions, and their performance characteristics. Further, the book will guide you through enhancing performance by using Java interoperability and JVM-specific features from Clojure. It also highlights the importance of using the right concurrent data structure and Java concurrency abstractions. This book also sheds light on performance metrics for measuring, how to measure, and how to visualize and monitor the collected data. At the end of the book, you will learn to run a performance profiler, identify bottlenecks, tune performance, and refactor code to get a better performance. Style and approach An easy-to-follow guide full of real-world examples and self-sufficient code snippets that will help you get your hands dirty with high performance programming with Clojure.

Clojure Reactive Programming

Author : Leonardo Borges
ISBN : 9781783986675
Genre : Computers
File Size : 82. 67 MB
Format : PDF, ePub
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If you are a Clojure developer who is interested in using Reactive Programming to build asynchronous and concurrent applications, this book is for you. Knowledge of Clojure and Leiningen is required. Basic understanding of ClojureScript will be helpful for the web chapters, although it is not strictly necessary.

Clojure For Finance

Author : Timothy Washington
ISBN : 9781785287619
Genre : Computers
File Size : 40. 87 MB
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Leverage the power and flexibility of the Clojure language for finance About This Book Apply the Clojure programming language in financial analytics and to build financial applications Work with high-level mathematical abstractions without having to implement low-level code for financial operations. This is a practical tutorial that takes you through real-world examples of financial analytics and applications with Clojure Who This Book Is For If you're a finance professional who is currently using VBA (Excel) to perform financial calculations and quantitative analysis, and would like to use Clojure instead to improve their efficiency, then this book is for you. Basic knowledge of financial concepts is essential. Basic programming knowledge would also be an added advantage. What You Will Learn Quickly and effectively represent data and calculations using Clojure Use Clojure's basic language tools such as laziness, immutability, and firstclass functions to solve real-world problems Explore mathematical derivatives to generate different wave forms Get acquainted with the advanced approaches to calculating and transforming data, and building algorithms Use Clojure's functions to access, update, and compose data structures Be introduced to the concept of sideeffecting behavior and the different ways to handle it Compose simple and exponential functions together to get a buy or sell signal In Detail Clojure is a dynamic programming language with an emphasis on functional programming. Clojure is well suited to financial modeling as it is a functional programming language. Such languages help developers work with high-level mathematical abstractions without having to implement low-level code that handles the arithmetic operations. Starting with the importance of representing data and calculations effectively, this book will take you all the way to being competent in financial analytics and building financial applications. First, we introduce the notions of computation and finance, which will help you understand Clojure's utility to solve real-world problems in many domains, especially finance. Next, we will show you how to develop the simple-moving-average function by using the more advanced partition Clojure data transformation function. This function, along with others, will be used to calculate and manipulate data. You will then learn to implement slightly more complicated equations, how to traverse data, and deal with branching and conditional dispatch. Then, the concept of side-effecting and its various approaches are introduced, along with the strategy of how to use data as the interface to other systems. Finally, you will discover how to build algorithms while manipulating and composing functions. Style and approach This book is a practical step-by-step tutorial that provides a basic overview of the concepts but focuses on providing the skills required to analyze data.

Clojure Data Structures And Algorithms Cookbook

Author : Rafik Naccache
ISBN : 9781785287824
Genre : Computers
File Size : 36. 21 MB
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25 recipes to deeply understand and implement advanced algorithms in Clojure About This Book Explore various advanced algorithms and learn how they are used to address many real-world computing challenges Construct elegant solutions using impressive techniques including zippers, parsing, and pattern matching Solve complex problems by adopting innovative approaches such as logic or asynchronous programming In Detail Data-structures and algorithms often cross your path when you compress files, compile programs, access databases, or simply use your favourite text editor. Understanding and implementing them can be daunting. Curious learners and industrial developers can find these complex, especially if they focus on the detailed implementation of these data structures. Clojure is a highly pragmatic and expressive language with efficient and easy data manipulation capabilities. As such, it is great for implementing these algorithms. By abstracting away a great share of the unnecessary complexity resulting from implementation, Clojure and its contrib libraries will help you address various algorithmic challenges, making your data exploration both profitable and enjoyable. Through 25 recipes, you'll explore advanced algorithms and data-structures, well served by a sound Clojure implementation. This book opens with an exploration of alternative uses of the array data-structure, covering LZ77 compression, drawing fractals using Pascal's triangles, simulating a multi-threaded program execution, and implementing a call-stack winding and un-winding operations. The book elaborates on linked lists, showing you how to construct doubly linked ones, speed up search times over the elements of such structures, use a linked-list as the foundation of a shift-reduce parser, and implement an immutable linked-list using skew binary numbers representation. After that, the tree data-structure is explored, focusing on building self-balancing Splay Trees, designing a B-Tree backing-up an efficient key-value data-store, constructing an undo capable Rope, and showing how Tries can make for an auto-completing facility. Next, some optimization and machine learning techniques are discussed, namely for building a co-occurrence-based recommendation engine, using branch-and-bound to optimize integral cost and profit problems, using Dijkstra's algorithm to determine optimal paths and summarizing texts using the LexRank algorithm. Particular attention is given to logic programming, you will learn to use this to discover interesting relations between social website data, by designing a simple type inferencer for a mini Java-like language, and by building a simple checkers game engine. Asynchronous programming will be addressed and you will design a concurrent web-crawler, an interactive HTML5 game, and an online taxi booking platform. Finally, you'll explore advanced cases for higher order functions in Clojure while implementing a recursive descent parser using efficient mutual resucrsion, devising a mini resusable firewall simulator thanks to Clojure 1.7 new tansducers feature or building a simple unification engine with the help of Continuation Passing Style. What You Will Learn Explore alternative uses of classical data-structures like arrays and linked-lists Discover advanced types of tree data-structures Explore advanced machine learning and optimization techniques Utilise powerful Clojure libraries, such as Instaparse for parsing, core.match for pattern matching, for zippers, and clojure.matrix for matrix operations Learn logic programming through the usage of the library core.logic Master asynchronous programming using the core.async library See the transducers in action while resolving real-world use-cases Who This Book Is For If you are an experienced Clojure developer, longing to take your knowledge to the next level by discovering and using advanced algorithms and seeing how they can be applied to real-world problems, then this book is for you. Style and approach This book consists of a set of step-by-step recipes, each demonstrating the material covered in action so it is put in context. When necessary, pointers to further resources are provided.

Clojure Web Development Essentials

Author : Ryan Baldwin
ISBN : 9781784394875
Genre : Computers
File Size : 78. 62 MB
Format : PDF, Docs
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This book is for anyone who's worked with Clojure and wants to use it to start developing applications for the Web. Experience or familiarity with basic Clojure syntax is a must, and exposure to Leiningen (or other similar build tools such as Maven) would be helpful.

Clojure Data Analysis Cookbook Second Edition

Author : Eric Rochester
ISBN : 9781784399955
Genre : Computers
File Size : 43. 54 MB
Format : PDF, Docs
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This book is for those with a basic knowledge of Clojure, who are looking to push the language to excel with data analysis.

Programming Concurrency On The Jvm

Author : Venkat Subramaniam
ISBN : 9781680504309
Genre : Computers
File Size : 20. 58 MB
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More than ever, learning to program concurrency is critical to creating faster, responsive applications. Speedy and affordable multicore hardware is driving the demand for high-performing applications, and you can leverage the Java platform to bring these applications to life. Concurrency on the Java platform has evolved, from the synchronization model of JDK to software transactional memory (STM) and actor-based concurrency. This book is the first to show you all these concurrency styles so you can compare and choose what works best for your applications. You'll learn the benefits of each of these models, when and how to use them, and what their limitations are. Through hands-on exercises, you'll learn how to avoid shared mutable state and how to write good, elegant, explicit synchronization-free programs so you can create easy and safe concurrent applications. The techniques you learn in this book will take you from dreading concurrency to mastering and enjoying it. Best of all, you can work with Java or a JVM language of your choice - Clojure, JRuby, Groovy, or Scala - to reap the growing power of multicore hardware. If you are a Java programmer, you'd need JDK 1.5 or later and the Akka 1.0 library. In addition, if you program in Scala, Clojure, Groovy or JRuby you'd need the latest version of your preferred language. Groovy programmers will also need GPars.

Software Service And Application Engineering

Author : Maritta Heisel
ISBN : 9783642308352
Genre : Computers
File Size : 45. 47 MB
Format : PDF, ePub, Docs
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This festschrift volume, published in honor of Bernd Krämer on the occasion of his 65th birthday, contains 11 contributions by close scientific companions. Covering topics like Petri nets and theoretical computer science, software and service engineering, cloud computing, and e-learning, the articles presented span the range of the scientific work of Bernd Krämer.

Clojure Concurrency

Author : Milan Mulji
ISBN : 178588607X
Genre :
File Size : 60. 72 MB
Format : PDF, Docs
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Build high-performance multithreaded applications using Clojure's powerful toolsAbout This Book* Get to know the low and high level concepts of parallel programming and concurrency in detail* Get the only book on the market focused on Clojure concurrency* A comprehensive guide with step-by-step approach that will help you learn the mechanisms to build concurrent applicationsWho This Book Is ForThis book is for users who have a basic understanding of Clojure and wants to dive deep in the technology. Prior knowledge of concurrent programming is not required. If you have a solid understanding of the Java language, you will also find this book helpful.What You Will Learn* Understand the JVM primitives upon which other abstractions are built* Avoid the typical problems developers come across while writing concurrent applications* Grasp the different approaches to write concurrent and parallel applications* Build concurrent applications at scale using the Cloud and OSS* Differentiate between application requirements and select appropriate implementation patterns* Set up a basic project using Leiningen* Write code that can protect against application errors using transactions* Build a small fault-tolerant application using the Actors concurrency mechanism* Develop applications that utilise GPU computationIn DetailConcurrency programming helps developers capture the logical structure of certain applications and cope with independent physical devices thus ensuring multiple users work on a database without interference.Clojure is a great language to build concurrent applications with. Many applications require simultaneous task processing, but Clojure uses a multi-threaded approach to implement concurrent programming.Through this book, you will be able to understand the philosophy of Clojure and leverage the power of the multicore processor. We will help you write your code more efficiently and make inherently more scalable. You will learn to build and test robust programs that make full use of your hardware. We will also take a look at writing concurrent applications at scale that run on the cloud with multiple servers.

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