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Download Erlang Programming by Simon Thompson, Francesco Cesarini PDF

By Simon Thompson, Francesco Cesarini

This e-book is an in-depth creation to Erlang, a programming language perfect for any state of affairs the place concurrency, fault tolerance, and speedy reaction is key. Erlang is gaining frequent adoption with the appearance of multi-core processors and their new scalable method of concurrency. With this advisor you'll how to write advanced concurrent courses in Erlang, despite your programming history or adventure.

Written by way of leaders of the foreign Erlang neighborhood -- and according to their education fabric -- Erlang Programming makes a speciality of the language's syntax and semantics, and explains trend matching, right lists, recursion, debugging, networking, and concurrency.

This booklet is helping you:

* comprehend the strengths of Erlang and why its designers integrated particular features
* research the suggestions at the back of concurrency and Erlang's method of dealing with it
* Write effective Erlang courses whereas protecting code neat and readable
* notice how Erlang fills the necessities for allotted systems
* upload easy graphical person interfaces with little effort
* research Erlang's tracing mechanisms for debugging concurrent and disbursed systems
* Use the integrated Mnesia database and different desk garage features

Erlang Programming offers workouts on the finish of every bankruptcy and straightforward examples during the book.

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Extra resources for Erlang Programming

Example text

If you are looking into writing a number-crunching application, a graphics-intensive system, or client software running on a mobile handset, then sorry, you bought the wrong book. But if your target system is a high-level, concurrent, robust, soft real-time system that will scale in line with demand, make full use of multicore processors, and integrate with components written in other languages, Erlang should be your choice. As Tim Bray, director of Web Technologies at Sun Microsystems, expressed in his keynote at OSCON in July 2008: If somebody came to me and wanted to pay me a lot of money to build a large scale message handling system that really had to be up all the time, could never afford to go down for years at a time, I would unhesitatingly choose Erlang to build it in.

The most popular open source Erlang applications include the following: The 3D subdivision modeler Wings 3D, used to model and texture polygon meshes. The Ejabberd system, which provides an Extensible Messaging and Presence Protocol (XMPP) based instant messaging (IM) application server. The CouchDB “schema-less” document-oriented database, providing scalability across multicore and multiserver clusters. The MochiWeb library that provides support for building lightweight HTTP servers. It is used to power services such as MochiBot and MochiAds, which serve dynamically generated content to millions of viewers daily.

Two Erlang rewrites were done of the DM and only one of the DCC. The first DM implementation interfaced with Motorola’s libraries, and the second was a pure Erlang implementation. The DCC was a pure Erlang implementation. Comparisons were made of the performance, robustness, productivity, and impact of the programming language constructs. The interesting conclusions of this research came with the pure Erlang implementations. In the DM, there was an 85% reduction in code. This was explained by the fact that 27% of the C++ code consisted of defensive programming, 11% of memory management, and 23% of high-level communication, all features which in Erlang are part of the semantics of the language or are implemented in the OTP libraries.

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