programming in scala

Overloaded Methods and fields The unified access principle is just one aspect of Scala's more unified approach to fields and methods than Java. Another difference is Scala, where fields and methods belong to the same namespace. This makes it possible to overload the field with a parameterless method. For example, you can change the implementation of a contents in a class arrayelement from one method to a field without having to modify the contents ab

1. Array2, ArrayBuffer3. Traversing array and Arraybuffer4. Common Array Operations1. ArrayIn Scala, array stands for a similar meaning to Java and is an immutable array of lengths. Since both Scala and Java are running in the JVM, the two sides can call each other, and the underlying implementation of the Scala array is actually a Java array.　　2, ArrayBufferIn

1. Development environment 1.1. Package Download 1.1.1. JDKHttp://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.htmlInstall to the D:\GreenSoftware\Java\Java8X64\jdk1.8.0_91 directory 1.1.2. Mavenhttps://maven.apache.org/download.cgiUnzip to the D:\GreenSoftware\apache-maven-3.3.9 directory 1.1.3. Scalahttps://www.scala-lang.org/download/Unzip to the D:\GreenSoftware\Java\scala-2.12.6 directory 1.1.4. ThriftHttp://thrift.apac

To look at Scala from an object-oriented perspective, Scala can be said to be a purely object-oriented programming language, because everything in Scala can be viewed as an object. This is different from Java, which distinguishes between basic data types and reference types. Numeric objects 5210000 + 1 *1024/1 This is the basic operation in Java, but

why not suggest return in Scala Using return in Scala, the compile will prompt the latest statement is method is automatically returned, and use of th return keyword is redundant. The warning is that the result of the last statement is automatically returned, and no return statement is required.Scala does not recommend using the return keyword, which is very uncomfortable when you are just touching functio

I. BACKGROUNDBecause of the project needs, the MySQL database needs to be connected to the Sbt+scala project. As a result of the previous use of Maven+java to rely on management, in the Sbt+scala aspect is also constantly groping, hereby recorded, as a small module accumulation of knowledge.Second, the system environmentThe versions of Scala, SBT, and IDE are as

Scala and SBT are installed by default and have a basic understanding of SBT and know how to build a project with SBT.Add dependencyTo use the PostgreSQL database in Scala, you need to import PostgreSQL driver-related library files, PostgreSQL library files, can be downloaded to their official website, be sure to download and your Scala, JDK corresponding version

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 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

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

java Next Generation: Choose your next JVM language if any Java next-generation language is appropriate for your next-generation language, how would you choose? This article investigates the various factors that will have an impact on this important decision. java Next generation: Overcoming synonyms interferes with the previous Java Next Generation article ("Functional Coding style") contrasts and compares the functional coding styles in Scala