programming in scala

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

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

Because of spark's sake, let's look at another language--scala, why do you want to see this language? Alas, it doesn't matter if you don't see it, but the kernel of Spark is written in Scala, and Spark also offers programming models for other languages .... See your Hobbies ~1. DownloadAddress: http://www.scala-lang.org/download/2.11.1.htmlDownload installation can, this is nothing to say, if not, then I su

One of Scala's strengths is that it can be very simple to interact with existing Java code, and all classes in Java.lang have been automatically imported, while others need to explicitly declare imports.Let's take a look at the demo code. We want to format the date, for example the format of the country of use.The Java Class Library defines a series of useful classes, such as date and DateFormat. Since Scala has a good interaction with Java, we don't

Scala has not only introduced functional concepts to the JVM, it has also provided us with a modern perspective on object-oriented language design. In this part of the Scala guide for Java developers, Ted Neward describes how Scala leverages features (trait) to make objects simpler and more easily built. You will learn that there are similarities and differences

1. Scala single-Case object Scala Singleton objects are very important, not like in Java, there are static classes, static members, static methods, but Scala provides object objects, which are similar to Java static class, its members, its methods are static by default. If the static member of object is to be accessed by the outside world, the member cannot be

Idea Download: https://www.jetbrains.com/idea/download/#section =windows After the download installs the idea, configure Scala 1: First download Scala Pulgins:https://plugins.jetbrains.com/plugin/1347-scala (choose the version that suits you) 2: Configure plug-in into idea (sort in red box: Left to right order) 3: Complete 4: Configure the global Java

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

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

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

1. Download1.1Scala DownloadsWindows Edition: http://www.scala-lang.org/download/Linux version: http://www.scala-lang.org/download/2.11.8.htmlPull to the bottom:1.2ScalaIDE Downloads: http://scala-ide.org/download/sdk.htmlinstall Scala under 2.WindowsEnvironment: windows10+jdk1.7+scala2.11.82.1 InstallationHere, change the installation location:Done2.2 Test whether the installation was successfulFirst, set

Classes (Class)A class is a template for an object that, by constructing a class, can declare a series of objects of the same structure using the New keyword. One source file for Scala can contain more than one public class. Declaring the person class: Class person{ var name:string = _ Val Age = 10 Private[this] val gender = "Male" } Description The Name field is assigned the value "_" "_", which is a placeholder. Indicates that name is declared as St

About ScalaScala is a "stretched language", which can be changed and grown with the needs of the user. Scala can be used in a wide range of programming tasks, as small as scripts to build systems. Scala runs on the standard Java platform and can interact seamlessly with all Java libraries. It adds object-oriented and functional programming concepts to statically typed languages .

http://blog.csdn.net/lovehuangjiaju/article/details/47009607 The main contents of this section 1 class definitions, creating objects2 Main constructor3 Auxiliary constructor class definition, creating object Use keyword class to define class person { //class member must initialize, otherwise error //This is defined as a public member var name:string=null }1 2 3 4 5 6 1 2 3 4 5 6 The person class generates a Person.class file after compilingUsing the javap-prviate Person command to view t

Https://github.com/derekwyatt/vim-scala provides a choiceLook at the install manual and find that two commands are required.mkdir -P ~/.vim/{ftdetect,indent,syntax} for in ftdetect indent syntax Do wget --no-check-certificate-o ~/.vim/$d/scala.vim https:// raw.githubusercontent.com/derekwyatt/vim-scala/master/$d/scala.vim; DoneThen install Vim-scala via Vu