coursera scala

A systematic study of Scala has recently begun. In fact, I used Scala before, for example, when I was using Gatling's performance testing tool, I was exposed to Scala. Gatling itself is written in Scala, and the Gatling performance Test profile itself is a Scala class that i

The main contents of this section Introduction to Scala I/O operations Scala Writing Files Scala Read files Scala Network I/O Introduction to Regular expressions Scala regular-expression combat 1. Introduction to

ArrayLike an array of Java, it is also an immutable arrays, and since both Scala and Java are running in the JVM, both sides can call each other, so the bottom of the Scala array is actually a Java array. Note: Accessing an array of elements using () instead of [] in Java Scala>ValA =NewArray[string] (Ten) a:array[string] = Array (NULL,NULL,NULL,NUL

Scala fields in Classes private var definition fieldClass Student (name:string, age:int) {private var _id:int = Name.hashcode def id:int = _id//reader method def id_= (newid:int): Unit = _id = NewId//writer method def sayhi (): String = {"My name is" + name + ", my-age was" + age} } Within the class, define one such attribute field, private var _id:int = Name.hashcode. Decompile the following, C:\workspace5-gitosc\

Seventh step: Parameterized array with typeYou can instantiate an object or class instance using new in Scala. When you instantiate an object in Scala, you can parameterize it with values and types: parameterize. Parameterization means "set" it when you create an instance. Parameterize an instance with a value by passing the object in parentheses to the constructor of the instance. For example, the followin

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

"Editor's note" Although Java has won a lot of developers love, but compared to other modern programming languages, its syntax is indeed slightly lengthy. But with Java8, you can write code that is both readable and concise by using lambda expressions directly. The author Hussachai Puripunpinyo's software engineer, who analyzed the differences in performance and expression by comparing Java 8 and Scala, and discussed in depth the differences between t

1, Scala and Java have 7 numeric types: int, short, long, byte, float, double, Boolean 7 kinds, but in Scala, these 7 types of values are classes, in Java, the basic type, Java, Data types are divided into basic types and reference types, which are not differentiated in Scala.2. The type of a variable or function in Scala