scala odersky

[TOC] Array fixed-length arraysIf you need an array of the same length, you can use the arrays in Scala. For example:val numsArray = new Array[Int] (30) //长度为30的整数数组，所有元素初始化为0val stringArrays = new Array [String] (30) //长度为30的字符串数组，所有元素初始化为nullval sHello = Array("Hello", "World") //长度为2的Array[String]类型是推断出来的，已提供初始值就不需要newsHello(0) = "Hello Tom",使用()而不是[]来访问元素In the JVM, Scala's array is implemented as a Java array. The array in the example is of

Get a quick look at the Scala technology stackI was hopelessly a huge fan of Scala. After I used the Scala development project and wrote the framework, it seemed to condense into a huge black hole, and the attraction made me fly to it so that I started to deviate from Java. Although Java 8 for the Java camp added a glimmer of light, but it is wistfully, awaited b

Why do you write this blog?First of all, for the Spark project, it is highly recommended to build, with IntelliJ idea (Ultimate version), if you have another hobby to try Scala ideas for Eclipse, have time to play for yourself. But it's best to follow the crowd.For Hadoop projects, Eclipse is strongly recommended.Second, out of a Bo friends to give me the need to leave a message, in order to more efficient and high-quality help everyone, comb write do

工欲善其事, its prerequisite. This is also true for Scala, where you have to complete the installation of Scala and choose the right IDE before you start learning ScalaThis paper is mainly divided into two parts:Installation of 1.scala2.11.6 and use of REPLInstallation and use of the 2.Scala eclipse plugin1.scala2.11.6 installation and use of REPLThis section mainly d

1. Translating Java Classes to Scala ClassesExample 1:inch Javapublic class book{}# Scala equivalent of a class Declarationclass bookExample 2:# A Java class with a Construtorpublic class book{ int ISBN; Private final String title; Public book (int ISBN, String title) { = ISBN; = title; } int GETISBN () { return ISBN; } Public String GetTitle () { retu

open source ecosystems, Scala can integrate into existing IT environments without migrating. Second, Scala is based on the Haskell and ML function principles, drawing heavily on the object-oriented concepts that Java programmers love. As a result, it can combine the advantages of two areas to provide significant benefits and not lose the familiar technology we have relied on. Finally,

ObjectiveFirst of all, we want to emphasize one important thing at the outset: Scala's pattern matching occurs but is not limited to the match case statement block, which is one of the key factors that Scala pattern matching is important and useful! We will discuss this in detail in the latter part of the article.Types of pattern matchingThere are several types of pattern matching in Scala: Wildcar

Scala is a strong static language that integrates object-oriented and functional features and can run on JVM. Because it can run on JVM and draw on a large number of Java language features during design, it can interact with Java and call Java-related class libraries, this makes great use of the intellectual investment of programmers who have mastered Java. It also draws on the elang function language and Ruby and other scripting languages to provide

[Big data from introductory to discard series tutorial] in Idea's Java project, configure and join Scala, write and run Scala's Hello WorldOriginal link: http://www.cnblogs.com/blog5277/p/8615984.htmlOriginal Author: Blog Park------Click on the menu below to view Big data Getting started all tutorialsBig data from getting started to giving upUrl:Http://www.cnblogs.com/blog5277/category/1179528.htmlSplit ***********************************In fact, the

Sublime3 Compile run Scala program Using Sublime3 plus repl to invoke the command line, it is still convenient to run some code snippets. But direct compilation runs Scala programs, you need to add some settings. 1. Configuration: Select Tools->build system->new build system and replace with: {"cmd": ["D:\\scala\\bin\\scala.bat", "$file"]} Save file:scala.

The main contents of this section About Scala Why to learn Scala Scala language Preliminary 1. Introduction to ScalaThe Scala (Scala language abbreviation) language is a common programming language that runs on both the JVM and the. NET platform and can

Numeric type of 1.ScalaScala's numeric types are similar to Java's, and their scope is consistent with Java. Unlike Java, they are objects and are instances of the corresponding numeric classes. Scala provides powerful support for these numeric types through rich-Wrapper classes.1.1. Numeric typeScala's numeric type and range of values are shown in the table below. Boolean:true or False Byte:8 bit, signed (2-7 ~ 27-1) Short:16 bit, si