scala and akka

Prerequisite In this article, we'll create a mobile application that runs on an Android device. You will need to install the Android SDK; This article uses the V1.5 SDK. Application code will be written in the Scala programming language. If you've never used Scala, then it doesn't matter, because this article will explain the Scala code. However, even if you are

Scala fields in Classes private var definition fieldClass Student (name:string, age:int) {private var _id:int = Name.hashcode def id:int = _id//reader method def id_= (newid:int): Unit = _id = NewId//writer method def sayhi (): String = {"My name is" + name + ", my-age was" + age} } Within the class, define one such attribute field, private var _id:int = Name.hashcode. Decompile the following, C:\workspace5-gitosc\

Seventh step: Parameterized array with typeYou can instantiate an object or class instance using new in Scala. When you instantiate an object in Scala, you can parameterize it with values and types: parameterize. Parameterization means "set" it when you create an instance. Parameterize an instance with a value by passing the object in parentheses to the constructor of the instance. For example, the followin

There is a big data project, you know the problem area (problem domain), you know what infrastructure to use, and maybe even decide which framework to use to process all of this data, but one decision has been delayed: which language should I choose? (or perhaps more specifically, the question is, what language should I force all my developers and data scientists to use?) The question will not be postponed for too long, but will be decided sooner or later.Of course, nothing prevents you from usi

To the Scala website, download the Scala SDK, address: http://www.scala-lang.org/download/ademacbook-pro:scala-2.11. 6 apple$ wget http://downloads.typesafe.com/scala/2.11.6/scala-2.11.6.tgz?_ga= 1.266727886.1594027332.1432723613Unzip and configure:ademacbook-pro:scala-2.11. 6 apple$ tar-zxvf

Scala Eclipse SBT Application developmentGeneral steps for building eclipse to develop Scala applicationsFirst, the Environment preparation:1, scala:http://www.scala-lang.org/2. Scala IDE for eclipse:scala-ide.org3, sbt:http://www.scala-sbt.org/4. SBT Eclipse:https://github.com/typesafehub/sbteclipse typesafe an SBT for Eclipse helper that can help build eclipse5

The relationship between Scala and Java, I think, can begin with a sentence: Scala comes from Java, but it's higher than Java.Scala's designer Martin Odersky is a Java control, the man who designed the Javac and wrote the common code in the JDK. It can be said that the Java language itself is Martin Odersky one step at a glance to grow up. So Scala can say that i

I've written about go (my spare time) at Google and I've written Scala on LinkedIn. Both are modern languages with best-in-class concurrency features.The following answer is based on my experience of writing large-scale software.Go is a language in which the development pattern is rigidly fixed and compiled into machine code with minimal code amount.Scala is a complex, academic, functional, object-oriented sandbox language that has many features and r

A method can appear as part of an expression (call a function and pass a parameter), but the method (with the parameter method) cannot be the final expression,But the function can appear as the final expression:Scala>//Define a methodScala> def m (x:int) = 2*xM: (x:int) IntScala>//define a functionScala> val f = (x:int) = 2*xF:int = Int = Scala>//method cannot appear as a final expressionScala> mFollow this method with ' _ ' If you want to treat it as

Control structures and functions 1. Write a sample program to show whyPackage Com.horstmann.impatientdiffers fromPackage comPackage HorstmannPackage impatientDescription: The difference is that the upper layer of the latter package is also visible, while the string is only visible in the current package scopeProgram code: B.scala Package com{ Package horstmann{ Object a{ def hi=println ("I am A") } Package impatient{ Object B extends app{ def Hi=a.hi Hi } }

Scala"", "Sans-serif" '> and groovy are both JVM-based languages, which have more concise syntax and rich expression capabilities than Java. Scala and groovy are good choices for developers who want to avoid tedious Java statements without leaving the JVM. But which one can take the lead in the future development process? Which one is the future development direction? These are problems that plague develope

In other words, ivony... wrote in Lao Zhao, "using Scala language (below) on the. NET platform: analysis," commented on the 18th floor of this article: I use scala. net in the Ubuntu operating system, and this should not be the case. So let's test it. Now, we add a DOTNET. CS file, as shown below: using System;using System.IO;using System.Web;using System.Collections.Generic;namespace Skyiv{ public class

Scala has a lot in common with Java, but it's a lot different. This is primarily a Java developer's perspective, summarizing some of the thinking changes that are faced in the process of using Scala. Here is just a summary of the two languages in the development process of the different, will be updated after some switching in the development process is worth noting. The following is a list of some of t

There is a big data project, you know the problem area (problem domain), you know what infrastructure to use, and maybe even decide which framework to use to process all of this data, but one decision has been delayed: which language should I choose? (or perhaps more specifically, the question is, what language should I force all my developers and data scientists to use?) This question will not be postponed for too long, but will be decided sooner or later.Of course, nothing prevents you from us

The name of the Scala language comes from the "extensible language", and Scala is a language that blends the function objects. It can run on the Java platform, and the Scala program is compiled into the JVM's byte code. Their performance is usually consistent with Java programs. Scala code can invoke Java methods, Acce

Array-related operations Summary:This article mainly learns how to manipulate arrays in Scala. Java and C + + programmers typically use arrays or approximate structures , such as array lists or vectors , to collect a set of elements. In Scala, we have more choices, but now let's assume that we don't care about other choices, but just want to start using arrays right away. The main points of this

This is a creation in Article, where the information may have evolved or changed. See the previous: Java, Scala, and go languages multi-threaded concurrency comparison test. Related code Download: http://qinhui99.itpub.net/resource/2570/31876Test results and conclusionsCount the number of prime numbers in a 1~n, and record the time spent. The same n, the less time performance the better. AMD Dual Core 2.8G, 4G memory winxp Java+conc java+akka1.3java+a

Scala is written specifically for the Java™ platform, so its syntax design makes Java code-coding people feel relaxed. At the same time, Scala provides the JVM with the inherent power of functional languages, and starts with these functional design concepts. In this issue of the Scala Guide series for Java developers, Ted Neward will introduce nuances between the

Let me start with Scala and get to know Scala in this chapter: 1, why I study Scala, the difference between her and Java 2, basic types in Scala and Operations 3, Scala classes and objects Why I study Scala, the difference betwee