Download Clojure High Performance Programming (2nd Edition) by Shantanu Kumar PDF

By Shantanu Kumar

Become a professional at writing quickly and excessive performant code in Clojure 1.7.0

About This Book
• increase code functionality through the use of acceptable Clojure features
• increase the potency of functions and plan their deployment
• A hands-on consultant to designing Clojure courses to get the easiest performance

Who This booklet Is For
This publication is meant for intermediate Clojure builders who're trying to get a very good grip on attaining optimal functionality. Having a easy wisdom of Java will be helpful.

What you are going to Learn
• establish functionality matters in Clojure courses utilizing assorted profiling tools
• grasp recommendations to accomplish numerical functionality in Clojure
• Use Criterium library to degree latency of Clojure expressions
• make the most Java positive aspects in Clojure code to reinforce performance
• keep away from mirrored image and boxing with style hints
• comprehend Clojure's concurrency and state-management primitives in depth
• degree and display screen functionality, and comprehend optimization techniques

In Detail
Clojure treats code as facts and has a macro method. It makes a speciality of programming with immutable values and specific progression-of-time constructs, that are meant to facilitate the improvement of extra powerful courses, really multithreaded ones. it really is outfitted with functionality, pragmatism, and straightforwardness in brain. Like so much normal function languages, a variety of Clojure good points have diverse functionality features that one should still recognize so as to write excessive functionality code.

This booklet indicates you the way to guage the functionality implications of assorted Clojure abstractions, detect their underpinnings, and follow the suitable technique for maximum functionality in real-world programs.

It begins by means of assisting you classify a number of use instances and the necessity for them with appreciate to functionality and research of varied functionality features. additionally, you will examine the functionality vocabulary that specialists use through the international and realize a variety of Clojure information constructions, abstractions, and their functionality features. extra, the ebook will advisor you thru improving functionality through the use of Java interoperability and JVM-specific beneficial properties from Clojure. It additionally highlights the significance of utilizing the perfect concurrent info constitution and Java concurrency abstractions.

This ebook additionally sheds mild on functionality metrics for measuring, the way to degree, and the way to imagine and computer screen the amassed information. on the finish of the e-book, you'll discover ways to run a functionality profiler, establish bottlenecks, song functionality, and refactor code to get a greater performance.

Style and approach
An easy-to-follow advisor choked with real-world examples and self-sufficient code snippets to help you get your arms soiled with excessive functionality programming with Clojure.

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If the call fails, an exception is thrown; otherwise, the object es holds a reference to the Web service proxy. Next a file path to the workbook is assigned. The path to the document must lead to a trusted location; 48 49 otherwise, the EWS OpenWorkbook method call will fail. Workbooks can be loaded only from trusted locations. The next line of code in the example populates a CredentialCache object. We will describe the Credentials object in greater detail later. For now, you should note that credentials are required with SOAP clients for EWS calls to be successful, even though default credentials are used.

For accessibility programming, you should always make use of system colors and avoid custom or Web color palettes where possible so that accessible screen changes can cascade down to your control. Chapter 7 will focus more on accessibility programming with Excel Services. 62 63 Approach 2: EWS with a DataGridView Bind a DataGridView object to the results of the EWS call. Consider the piece of code in Listing 2-5. Listing 2-5. Binding EWS results to a DataGridView control.

Excel Services trusted file locations. [View full size image] 49 50 Press F5 to exercise the application. The output in the console window should read "Excel Web Services (12)". The important points to remember are as follows: • Excel Services can connect only to workbooks that contain valid worksheets. • Excel Services cannot author spreadsheets or workbooks. xlsb extension. • The workbooks must reside on the MOSS server in the trusted file location with the appropriate permissions. • The Internet Information Services (IIS) server must have the Office Web Server Services service running.

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