coursera scala

Use Scala to build Spring boot framework 1. Objective Spring boot is the most popular web framework on the Java development platform. Scala is a static type of functional programming language that runs on the JVM. The Big data processing spark framework is developed in the Scala language. This example integrates the Spring boot framework i

Label: Introduced Scala is a kind of functional object-oriented language . It blends a lot of unprecedented features. At the same time, it executes on top of the JVM . With the growing interest of developers in Scala , and the increasing number of tools to support it, the Scala language will undoubtedly be an indispensable tool in your hands. MongoDB is a product

Now, here are the steps to build your development environment:Because Scala is a language on the JVM, we first install the Java Runtime environment. Download and install JDK8 from Oracle official website. Note that Scala only needs to run the Java environment, that is, to install only: JRE, but in order to facilitate future Java development, we still install the Java development environment. After the insta

There are several zip-related functions in Scala, such as zip,zipall,zipped, Zipwithindex, and so on. We often see such functions in our code, and this article mainly introduces the differences and uses of these functions.1, the ZIP function will pass in two parameters in the corresponding position of the elements to form a pair array. If one of the parameter elements is longer, then the extra parameters are deleted. Look at the English introduction:R

(Bus). Only through horizontal expansion (scale out), that is, distribution expansion by increasing the computer server and then using the distributed computing technology to divide the computational task into discrete servers for processing; This is the core of big data technology.Predictably, we will face the future: distributed data, high concurrency processing, parallel computing, NoSQL and very large interactive complex network platform programming. As a veteran programmer, experienced fro

Scala list/sequence faq:how do I iterate over a Scala List (or more generally, a sequence) using the foreach method or for loop?There is a number of ways to iterate over a Scala List using the foreach method (which was available to Scala sequences like ,,,, List Array ArrayBuffer Vector Seq , etc.) for and comprehensio

Previous Article: Scala Tutorial: interaction with Java, everything is an object This document is translated from the official Scala tutorial. to prevent misunderstanding, keep the original document for reference. Due to space limitations, there are three articles. Blog formats are not easy to adjust, interested friends can download PDF version: http://download.csdn.net/source/1742639 --- 6Condition class a

1. JDK official website address: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html Scala is based on Java and uses a large number of Java class libraries and variables. Therefore, you must install Java before using Scala. Install JDK and select the installation path Check whether the installation is successful Open CMD and enter Java-version. If the Java version is

1. Download Scala 2.9.2 Since the latest Scala 2.10 stabilizer is not finished, it's best to download the latest Scala stable version: 2.9.2.Download Address: Http://www.scala-lang.org/downloads/distrib/files/scala-2.9.2.msiThe advantage of downloading the MSI version is that the environment variable is automatically

First, download Scala installation package From the official Scala website address: http://www.scala-lang.org/download/Download Scala binary package, in 2.11.8 version For example two, installation 1. Move the downloaded binary package to the/usr/local directory and unzip the package Tar zxvf scala-2.11.8.tgz MV

Tags: in addition to the input situation Eclipse blog free org Speed waterBuild maven Scala projects with eclipse1. Install the Scala IDE first, help-->eclipse Marketplace---> Enter scala--and install.2, select the following 4 need to install3, then install down, until the installation is complete.Second, in addition to installing the

In a keynote speech with Martin Fowler, he provided a keen observation report: The legacy of Java is the platform , not the language . The original Java technical engineer had made a great decision to separate the language from the runtime, eventually enabling more than 200 languages to run on the Java platform . This infrastructure is critical to the long-term viability of the platform because the life of the computer programming language is usually very short. Since 2008

Map Construction Map Immutable: Val map = map ("sa"-> 1, "S"-> 2)Map ("sa") = 3 // Error Val emptymap = new scala. collection. Immutable. hashmap [String, int] Variable: Val MAP2 = scala. collection. mutable. Map ("sa"-> 2)MAP2 ("sa") = 3 Val emptymap = new scala. collection. mutable. hashmap [String, int] Note:-> used to create tuples, "sa"-> 1 ("sa", 1) Initial

Install Scala 2.10.x in Ubuntu The default scala version on Ubuntu 14.04.1 LTS is 2.9, while the latest spark-1.3 requires the lowest version of scala 2.10.x, first, use apt-get remove scala to clear old scala versions on the machine. Download the http://www.scala-lang.org/

Scala list faq:how do I add elements to a scala list?This was actually a trick question, because you can ' t add elements to a scalalist; It's an immutable data structure, like a Java String .prepending elements to Scala ListsOne thing you can does when working with a Scala was to List create a new from an List existin

Scala 学习One: Environment configurationScale official website address: http://scala-ide.org/download/sdk.html1: Install Java JDK2: Install Scala3: Install the Scala integrated IDESecond: Start the Scala learning journeyHello Scala Demo1: Create a new

We know that the IDE has a number of selected versions for development. As most of us often use is as follows.Eclipse * VersionEclipse * DownloadAnd we know that for the Scala development of Spark, there's a specially designed eclipse for it,Scala IDE for Eclipse　　1. Scala IDE for eclipse downloadhttp://scala-ide.org/

(Environment: Jdk1.7,scala plug-in scala-2.1.1.2-site.zip)1: Download Scala pluginHttp://download.scala-ide.org/sdk/helium/e38/scala211/stable/site 2: Unzip to LocalCopy all of the jar packages from the two files to the folder in the installation directory for Eclipse three: Restart Eclipse this will prompt you to have the plugin not enabled, click OK Four: Creat

Pattern matching using extractor: When an instance of a class is followed by parentheses using a list of 0 or more parameters, the compiler invokes the applied method on that instance. We can define both objects and classes. As mentioned above, the purpose of the Unapply method is to extract a particular value from what we are looking for. It operates in the opposite way as apply. An extract object that compares the Unapply method in a matching statement is automatically executed, as follows: Ob

Overview In short, implicit conversions are: When a Scala compiler does a type match, if the appropriate candidate is not found, implicit conversion provides another way to tell the compiler how to convert the current type to the expected type. The source of this article: http://blog.csdn.net/bluishglc/article/details/50866314 is strictly prohibited in any form of reprint, otherwise will entrust CSDN official maintenance rights and interests. Implici