travis scala

= Assignment operationScala's assignment operations are very different from Java's. For assignment operations such as A=B, the return value in Java is the value of a, and the unit is returned in Scala. The unit is a value type, where there is only a unique value, i.e. (), the unit is used only to declare the return value of a function or method, and other scenarios are basically meaningless. This can easily lead to some mis-use, such as A=b=c, which i

companion class and the companion object can access each other's private variables. The difference between the companion object and the companion class is that the companion object has no construction parameters becauseAn associated object cannot be instantiated.. Scala Program Scala is an object, either a companion object or a standalone object ). This object must have a method named main that ret

Using Val,var to declare variables in Scala,Scala writes the type of a variable or function behind a function or variable such as Var greet:stringYou can put multiple values or variables together in Scala for example: Var greeting, age:stringScala uses methods, rather than forcing type conversions, to convert between numeric types such as: 5.21.toInt get a, 99.to

Keith Morrow, a Scala supporter, published this Scala-oriented article to refute Paul Dix's article a year ago: why he prefers go over Node and Scala,paul Dix think go is better than scal A is due to the following aspects: concurrency, ease of understanding, code sharing and learning difficulties. One year after a few people retort, one because the two sides do n

1. Download and install IntelliJ idea and install the Scala plugin I downloaded the 13 version of Linux, the Linux version is the green version, there is a startup script, run on it, you can also build a shortcut on Linux. Download the version of Windows, click Next, and the next step is to install it. Next install the Scala plugin, open idea, search at the Welcome interface point, Configure->;

Objects in Scala Summary :In this article, you'll learn when to use Scala's object syntax structure. You'll use it when you need a single instance of a class, or if you want to find a place to call for other values or functions . The main points of this article include:1. Use the object as a singleton or as a storage tool method2. Classes can have a companion object of the same name3. Objects can extend classes or traits4. The Apply method

Welcome to the Scala discussion QQ group 212859367, and Lianle together to discuss learning!XML processingXML Word variablesval doc = ...XML node The node class is an ancestor of all XML node types. Example:li>Fredli>li>Wilmali>val nodes: NodeSeq = items* * Element propertiesTo work with the property keys and values of an element, you can use the Attraibutes property.val elem = "http://www.baidu.com">The Baidu Siteval url = elem.attribut

When I started learning Scala, I felt like learning Java. First, download the scala package from the website and install it. After installation, put the bin of the installation directory in the environment variable psomething. Enter Scala in cmd. If Scala appears, congratulations. The installation is successful ~~ 1:

1. Download the latest version of scala,http://www.scala-lang.org/2. Unzip the tgz under the installation path you wish.3. Configure the environment variables Scala_home, and path:(1) Enter the bin directory under your Scala decompression path of the terminal, for example jaycicledembp:~ jaycicle$ CD scala-2.11.7/bin(2) in the bin directory using sudo to enter th

1. Install the JDK and set environment variables (1) java_home = C:\Program Files\java\jdk1.8.0_11 (2) Path = D:\Program Files\scala\bin;%java_home%\bin;%java_home%\jre\bin (3) CLASSPATH =%java_home%\lib\dt.jar;%java_home%\lib\tools.jar; 2. Install Scala (click the Open link) and set the environment variables (1) scala_home = D:\Program Files\scala (2) Path