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Lazy sequences in Scala and Clojure

Lazy sequences (also known as streams) are an interesting functional data structure which you might have never heard of. Basically lazy sequence is a list that is not fully known/computed ...
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Advanced routing in Play Framework

We frequently get questions about how to meet all sorts of different routing needs in Play Framework. While the built in router is enough for most users, sometimes you may encounter ...
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Scala traits implementation and interoperability. Part II: Traits linearization

This is a continuation of Scala traits implementation and interoperability. Part I: Basics. Dreadful diamond problem can be mitigated using Scala traits and a process called linearization. ...
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WatchService combined with Akka actors

WatchService is a handy class that can notify you about any file system changes (create/update/delete of file) in a given set of directories. It is described nicely in the official ...
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Becoming Acquainted with Scala

There are many touted benefits of the Scala programming language, especially for Java developers. Among others, Scala’s advertised strengths and advantages include the following:Runs ...
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Synchronizing transactions with asynchronous events in Spring

Today as an example we will take a very simple scenario: placing an order stores it and sends an e-mail about that order:                   @Service class ...
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Scala traits implementation and interoperability. Part I: Basics

Traits in Scala are similar to interfaces, but much more powerful. They allow implementations of some of the methods, fields, stacking, etc. But have you ever wondered how are they ...
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FitNesse your ScalaTest with custom Scala DSL

This article won’t be about FitNesse. As matter of fact I don’t like this tool very much and it seems to be loosing momentum, judging by the traffic on an official mailing ...
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Gang of Four Patterns With Type-Classes and Implicits in Scala (Part 2)

Type-classes are a powerful tool for library creators and maintainers. They reduce boilerplate, open libraries to extension, and act as a compile time switch. Similarly, the GoF patterns ...
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Dependency injection with Scala macros: auto-wiring

You can look at dependency injection as a fancy name for passing parameters to a function (or constructor arguments to a constructor). However usually, DI containers do much more than ...
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