programming in scala

[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

[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

---------------------Preface---------------------Project relationship and want to do data analysis and image display with Spark GRAPHX, but only if Spark;spark is based on Scala, Scala is Java based ...So, in the case of Spark GraphX, the technology stack should generally be like this: Spark GraphX----, Scala, Java Java has been so many years ...Let's just say th

Tags: mirrored variable probabilities out language development Environment SDN path Java versionI. Introduction of Scala1. Processing big data with sparkThis is one of the main applications of Scala, and Spark is also written in Scala.2. Script language version of JavaYou can write Scala scripts directly, or you can use Scala