scala akka

1. Scala LearningOfficial website;Http://www.scala-lang.org/Http://www.scala-lang.org/download/A scalable language is a multi-paradigm programming language, similar to java, designed to integrate various features of object-oriented programming and functional programming.Scala runs on JVM.Scala has several key features that demonstrate its object-oriented nature. For example, each value in Scala is an object

Once an object is created, it will no longer change its contents, so that the object is immutable. This can be done without worrying about competition management when accessing objects in multiple threads, and Java's string is an example of an immutable object. Based on this, when you use Scala to create multithreaded applications, you can write unlocked code with the invariant state (immutable states) to write concise multithreaded code without worry

This chapter describes Scala's support for XML, including the main contents of this article at the level of headings. A description of the concept and XML format of semi-structured data is skipped, directly into Scala's XML-related syntax and usage. First, XML syntax The Scala command line can be entered directly at the beginning of a tag, and the compiler automatically enters the XML input pattern until it encounters a closing flag that matches the t

the system is windows. The installation configuration Scala is as follows: One, install Scala 1,java6 above (recommended Java 7 +) installation Address: http://www.oracle.com/technetwork/java/javase/downloads/index.html Configuring environment variables after installation 2,scala 2.12.2 Address: http://www.scala-lang.org/download/ 3. Download the post-installat

In a keynote speech with Martin Fowler, he provided a keen observation report: The legacy of Java is the platform , not the language . The original Java technical engineer had made a great decision to separate the language from the runtime, eventually enabling more than 200 languages to run on the Java platform . This infrastructure is critical to the long-term viability of the platform because the life of the computer programming language is usually very short. Since 2008

Array/ ing/tuples I. Array 1. Fixed Length Array Two forms of declaring an array: Declare the Val array name of the specified length = new array [type] (array length) 　　 Provides an array of initial values without the new keyword. 　　 Scala declares an array with an array class name and uses () to specify the length or provide an initial value sequence. In JVM, scala array is implemented in Java array

Now, here are the steps to build your development environment:Because Scala is a language on the JVM, we first install the Java Runtime environment. Download and install JDK8 from Oracle official website. Note that Scala only needs to run the Java environment, that is, to install only: JRE, but in order to facilitate future Java development, we still install the Java development environment. After the insta

There are several zip-related functions in Scala, such as zip,zipall,zipped, Zipwithindex, and so on. We often see such functions in our code, and this article mainly introduces the differences and uses of these functions.1, the ZIP function will pass in two parameters in the corresponding position of the elements to form a pair array. If one of the parameter elements is longer, then the extra parameters are deleted. Look at the English introduction:R

(Bus). Only through horizontal expansion (scale out), that is, distribution expansion by increasing the computer server and then using the distributed computing technology to divide the computational task into discrete servers for processing; This is the core of big data technology.Predictably, we will face the future: distributed data, high concurrency processing, parallel computing, NoSQL and very large interactive complex network platform programming. As a veteran programmer, experienced fro

Scala list/sequence faq:how do I iterate over a Scala List (or more generally, a sequence) using the foreach method or for loop?There is a number of ways to iterate over a Scala List using the foreach method (which was available to Scala sequences like ,,,, List Array ArrayBuffer Vector Seq , etc.) for and comprehensio

Previous Article: Scala Tutorial: interaction with Java, everything is an object This document is translated from the official Scala tutorial. to prevent misunderstanding, keep the original document for reference. Due to space limitations, there are three articles. Blog formats are not easy to adjust, interested friends can download PDF version: http://download.csdn.net/source/1742639 --- 6Condition class a

1. JDK official website address: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html Scala is based on Java and uses a large number of Java class libraries and variables. Therefore, you must install Java before using Scala. Install JDK and select the installation path Check whether the installation is successful Open CMD and enter Java-version. If the Java version is

1. Download Scala 2.9.2 Since the latest Scala 2.10 stabilizer is not finished, it's best to download the latest Scala stable version: 2.9.2.Download Address: Http://www.scala-lang.org/downloads/distrib/files/scala-2.9.2.msiThe advantage of downloading the MSI version is that the environment variable is automatically

First, download Scala installation package From the official Scala website address: http://www.scala-lang.org/download/Download Scala binary package, in 2.11.8 version For example two, installation 1. Move the downloaded binary package to the/usr/local directory and unzip the package Tar zxvf scala-2.11.8.tgz MV

Tags: in addition to the input situation Eclipse blog free org Speed waterBuild maven Scala projects with eclipse1. Install the Scala IDE first, help-->eclipse Marketplace---> Enter scala--and install.2, select the following 4 need to install3, then install down, until the installation is complete.Second, in addition to installing the

Typesafe Config library, pure Java writing, 0 external dependencies, code simplification, flexible functionality, API-friendly. Supports Java properties, JSON, JSON superset format Hocon, and environment variables. It is also a Akka configuration management library. Overview Pure Java implementation, without any reliance on full test support: Java properties, JSON, and a human-friendly JSON superset can merge various formats of the configuration file

Reprinted from Http://www.tuicool.com/articles/jYzuAv and http://www.importnew.com/1537.htmlIn a keynote speech that I collaborated with Martin Fowler, he made an insightful point:The legacy of Java will be the platform, not the programming language.The original engineers of Java technology made a wise decision to separate the programming language from the runtime environment, which ultimately enabled more than 200 languages to run on the Java platform. This architecture is critical to the long-

01. Introduction and installation of Scala 1.1 Scala introductionScala is the Java language scripting, the feature is that the Java language is not scripted to use the script, so that it has a simple script language, WYSIWYG features, and high programming efficiency, fast implementation and other characteristics. In the big Data world, the famous frameworks for Spark and Kafka are written in the

Functional Object Advantages and disadvantages of immutable object Adv 1. Immutable objects are more likely to be inferred because they do not change values over time. Adv 2. immutable objects can be automatically transmitted without changes. To transfer a mutable object, you must first back up the mutable object to prevent modification to the object state in other processes. Adv 3. The thread cannot change the state of an immutable object (corruption, corruption). It is destined to be thread-sa