Download Scala in Action by Nilanjan Raychaudhuri PDF

By Nilanjan Raychaudhuri


Scala in Action is a accomplished educational that introduces Scala via transparent reasons and diverse hands-on examples. simply because Scala is a wealthy and deep language, it may be formidable to soak up the entire new techniques instantaneously. This e-book takes a "how-to" strategy, explaining language techniques as you discover everyday programming demanding situations that you simply face on your daily work.

About the Technology

Scala runs at the JVM and combines object-orientation with sensible programming. It's designed to supply succinct, type-safe code, that is the most important for company purposes. Scala implements Actor-based concurrency during the extraordinary Akka framework, so that you can stay away from Java's messy threading whereas interacting seamlessly with Java.

About this Book

Scala in Action is a complete instructional that introduces the language via transparent factors and diverse hands-on examples. It takes a "how to" strategy, explaining language innovations as you discover universal programming projects. You'll take on concurrent programming in Akka, learn how to paintings with Scala and Spring, and the way to construct DSLs and different productiveness instruments. You'll research either the language and the way to take advantage of it.

Experience with Java is useful yet now not required. Ruby and Python programmers also will locate this e-book accessible.

What's Inside
• A Scala tutorial
• the right way to use Java and Scala open resource libraries
• tips to use SBT
• Test-driven development
• Debugging
• up to date for Scala 2.10

Purchase of the print booklet encompasses a loose publication in PDF, Kindle, and ePub codecs from Manning Publications.

About the Author

Nilanjan Raychaudhuri is a talented developer, speaker, and an avid polyglot programmer who works with Scala on construction systems.

Table of Contents
<ol><h5>PART 1 SCALA: THE BASICS</h5> • Why Scala?
• Getting started

• OOP in Scala

• enjoying sensible information structures

• useful programming
<h5>PART 2 operating WITH SCALA</h5> • development internet functions in sensible style

• Connecting to a database

• construction scalable and extensible components

• Concurrency programming in Scala

• construction self assurance with testing
<h5>PART three complicated STEPS</h5> • Interoperability among Scala and Java
• Scalable and allotted functions utilizing Akka

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Additional info for Scala in Action

Sample text

On the other hand, perhaps too much time was spent refactoring existing, working code, with not enough emphasis on introducing new behavior to the system. Whatever the reason, a 25-percent drop in velocity is not always disastrous, but it could be indicative of further problems to come that you should address as soon as possible. Week-after-week reductions in velocity—protracted deceleration—is a definite problem and probably points to code that is not adaptive to change; something that this book will help you address.

FIGURE 1-7 A sprint burndown chart at the beginning of a sprint. The straight line shows the “line of best fit” to the sprint goal (23 story points, in this example). 24 PART I An Agile foundation From the Library of Ida Schander At each morning’s stand-up Scrum meeting, the points associated with any completed user stories are claimed and deducted from the current remaining total. As illustrated in Figure 1-8, this shows the actual progress of the sprint against the necessary progress in order to achieve the sprint goal.

It is equivalent to saying something like, “We don’t have time for design,” which indicates a very unhealthy working environment. A decision such as this should alert everyone that the team is not adaptive, and is marching steadily toward inevitable failure. Reckless, inadvertent This type of debt is most likely created by a lack of experience. It is the result of not knowing best practices in modern software engineering. It is likely that the code is a mess, much like in the previous case, but the developer did not know any better and therefore could not find any other options.

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