![]() ![]() , and number99, you declare one array variable such as numbers and use numbers, numbers, and. Instead of declaring individual variables, such as number0, number1. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type. ![]() Scala provides a data structure, the array, which stores a fixed-size sequential collection of elements of the same type. Scala code runner version 2.13.1 - Copyright 2002-2019, LAMP/EPFL and Lightbend, Inc.tut Scala code runner version 2.13.1 - Copyright 2002-2019, LAMP/EPFL and Lightbend, Inc. I entered /usr/local/share, you can select a suitable path as per your convenience.įinally, open a new command prompt and type Scala -version and press Enter. Press 1 to continue, 2 to quit, 3 to redisplayĭuring installation, it will ask for license agreement, to accept it type 1 and it will ask a path where Scala will be installed. Welcome to the installation of Scala 2.13.1! I selected default given path "C:\Program Files\Scala", you can select a suitable path as per your convenience. During installation, it will ask for license agreement, simply accept it and further it will ask a path where Scala will be installed. This command will display an installation wizard, which will guide you to install Scala on your windows machine. Now, execute the following command at the command prompt − Platform Make sure you have admin privilege to proceed. You can download Scala from At the time of writing this tutorial, I downloaded 'scala-2.13.1-installer.jar'. Sr.NoĪppend the String "C:\Program Files\Java\jdk1.8.0_31\bin" to the end of the system variable PATH.Įxecute the command java -version from the command prompt as explained above. Set JAVA_HOME to C:\ProgramFiles\java\jdk1.8.0_31Īppend the full path of Java compiler location to the System Path. Set the environment variable JAVA_HOME to point to the base directory location where Java is installed on your machine. In case you do not have Java SDK, download its current version from and install it. ![]() We assume that the readers of this tutorial have Java SDK version 1.8.0_31 installed on their system. Open JDK 64-Bit Server VM (build 25.31-b07, mixed mode) A sample output is given in the following table. If the Java installation has been done properly, then it will display the current version and specification of your Java installation. ![]() To verify this, execute any of the following two commands depending on the platform you are working on. Step 1: Verify Your Java Installationįirst of all, you need to have Java Software Development Kit (SDK) installed on your system. Before you start installing Scala on your machine, you must have Java 1.8 or greater installed on your computer.įollow the steps given below to install Scala. Scala can be installed on any UNIX flavored or Windows based system. Option provides a container for zero or one element of a given type.Īn iterator is not a collection, but rather a way to access the elements of a collection one by one. Unlike an array or list, a tuple can hold objects with different types. Any value can be retrieved based on its key. Scala's List is a linked list of type T.Ī set is a collection of pairwise different elements of the same type.Ī Map is a collection of key/value pairs. This chapter throws light on the most commonly used collection types and most frequently used operations over those collections. When in doubt, it is better to start with an immutable collection and change it later if you need mutable ones. Note that immutable collections may contain mutable items.įor some problems, mutable collections work better, and for others, immutable collections work better. Additionally, collections may be mutable (the contents of the reference can change) or immutable (the thing that a reference refers to is never changed). Lazy collections have elements that may not consume memory until they are accessed, like Ranges. The collections may have an arbitrary number of elements or be bounded to zero or one element (e.g., Option).Ĭollections may be strict or lazy. Those containers can be sequenced, linear sets of items like List, Tuple, Option, Map, etc. Scala has a rich set of collection library. Scala Collections - Multi-Dimensional Array. ![]()
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