Jan 23, 2020 a generalpurpose programming language, scala provides support for functional programming and a strong static type system. Actually, it supports language interoperability with java. Indepth documentation covering many of scala s features. Rubin, phd director, center of excellence for big data graduate programs in software university of st.
There is no distinction between primitive types and class types in scala. For a more precise reference, the reader is referred to the scala. Scala programming tutorial learn scala programming scala. Byte, char, short, int, long, float, and double, and a boolean type. Lex spoon worked on scala for two years as a postdoc with martin odersky. Language interoperability is a huge benefit and we must take full advantage of it rather than using core scala libraries just for the buzzword or being cool. Cats is a library which provides abstractions for functional programming in the scala programming language. An introduction to scala for spark programming big data analytics. Scala is an amazing language with a lot of depth, im glad you want to learn it. Scala began life in 2003, created by martin odersky and his. Introduction to scala and spark sei digital library. Each lesson is long enough to give you an idea of how the programming language features work, but short enough that you can read it in fifteen minutes or less. First, make sure you have the java 8 jdk or java 11 jdk installed. This scala tutorial will help you learn scala programming language which is a promising language in big data analytics.
Scala is a lineoriented language where statements may be terminated by semicolons. Check out these best online scala courses and tutorials recommended by the programming community. The contents is based on the moocs functional programming principles in scala and functional program design in scala the target audience is people who already have some experience of programming and who are familiar with the jvm elements of programming. By learning the fundamentals of functional programming in combination with how scala syntax. Jun 08, 2015 one of the biggest mistakes a java developer can make when learning scala is to jump in headfirst. In this tutorial, we will go over the scala programming language. Scala by example learn scala through a series of examples. Shapeless is a type class and dependent type based generic programming library for scala.
Getting familiar with the ecosystem many people underestimate this step. Scala fuses objectoriented and functional programming in a statically typed programming language. Scala tutorial scala tutorial for beginners scala programming spark training. Scala s static types help avoid bugs in complex applications, and its jvm and javascript runtimes let you build highperformance systems with easy access to huge ecosystems of libraries. The following set of sections provides a quick tutorial on the scala language. Scala is a programming language that integrates the object oriented and functional language features. Scala smoothly integrates features of objectoriented and functional languages. Scala is also a functional language in the sense that every function is a value and every value is an object so ultimately every function is an object. The target audience is people who already have some experience of programming and who are familiar with the jvm. You have already seen some of the data types of the scala language, such as int and double. In this scala tutorial, you will learn about the hugely popular programming language, scala. Scala reference manuals the scala programming language. I think if it were done today, we would see the rank as scala, python, and java 18.
There is no need to download anything just click on the chapter you wish to begin from, and follow the instructions. Scala school started as a series of lectures at twitter to prepare experienced engineers to be productive scala programmers. It seamlessly integrates features of objectoriented and functional languages. Scala smoothly integrates the features of objectoriented and functional languages. A var is a reference variable, similar to variables in languages like java. Scala programming tutorial learn scala programming. After that point, it acts just like a regular val to use it add the lazy keyword before val. Scala is a big language, but you can use it effectively without knowing all of its details intimately.
The contents is based on the moocs functional programming principles in scala and functional program design in scala. This tutorial explains the basics of scala in a simple and reader friendly way. An indepth guide on how to write idiomatic scala code. The fold method iterates over a collection, using an initial accumulator value and applying a function that uses each element to update the accumulator successfully val nums list1,2,3,4,5 var initialvalue.
There are also several tutorials on scala ailableav 34, 18. The fold method iterates over a collection, using an initial accumulator value and applying a function that uses each element to update the accumulator successfully. Compared to other programming languages, installing scala is a bit unusual. This website, hello, scala is intended to provide a quick overview and introduction to the scala programming language. A semicolon at the end of a statement is usually optional. The functional implementation makes it look like scala is a language thats specialized for functional operations on arrays. Aug 24, 2015 scala tutorial scala tutorial for beginners scala programming spark training. It has been used to develop several scalable concurrent applications in the recent years. If you are earnestly looking for a technique to simplify your code for objectoriented programming projects but want to stick to functional programming, scala is one of the excellent choices you can opt for. Abstract types and mixin composition unify concepts from object and. Both of the above options manage via sbt a specific scala version per scala project you create.
Refer jdk compatibility for scalajava compatiblity detail. A beginners guide to the scala programming language dev. Different objects can be freely assigned to a var, so long as the given object has the same type that the var was declared with. You can type one if you want but you dont have to if the statement appears by itself on a single line. Our goal is that by reading this book, you can learn everything you need to be a productive scala programmer. Your contribution will go a long way in helping us. It smoothly integrates features of objectoriented and functional languages. If you are new to scala or coming from other programming backgrounds like java or. Scala is unusual because it is usually installed for each of your scala projects rather than being installed systemwide. Scala tutorial learn scala from experts intellipaat. Scala combines objectoriented and functional programming in one concise, highlevel language.
Scala does not have special syntax for array types and. Scala for readers who are knowledgeable in programming languages. This tutorial explains the basics of scala in a simple and readerfriendly way. Scala i about the tutorial scala is a modern multiparadigm programming language designed to express common programming patterns in a concise, elegant, and typesafe way. A beginners guide to the scala programming language madusudanan. Indepth documentation covering many of scalas features.
Heres a good learning path that i recommend to people who have some experience. I will keep this tutorial very high level as we will have othe. The type system support includes variance annotations, generic classes, upper and lower bounds, explicitly typed self references, views and polymorphic methods. This programming language was developed by martin odersky and released in 2003. I will keep this tutorial very high level as we will have other tutorials to follow on the features of scala.
Being much like java programming, scalas source code compiles into java bytecode. This book is a tutorial for the scala programming language, written by people directly involved in the development of scala. Different objects can be freely assigned to a var, so long as the given object has the same type that the var was declared with scala var x 1 x. Through this tutorial you will learn scala installation, basic data types, scala operators, arrays, strings, collections, classes, objects, functions, regular exceptions, exception handling and more. Scala programs can convert to bytecodes and can run on the jvm java virtual machine. The scala journey 16 java scala oo features enough scala functional features to use use the scala api in apache spark fullblown functional programming. An online book introducing the main language features. Programming in scala preprint edition version 2 martin odersky is the creator of the scala language and a professor at epfl in lausanne, switzerland. Scala has been created by martin odersky and he released the first version in 2003. Sep 21, 2018 scala is an acronym for scalable language scala is a modern multiparadigm programming language designed to express common programming patterns in a concise, elegant, and typesafe way. Scala for beginners this book provides a stepbystep guide for the complete beginner to learn scala.
You have already seen some of the data types of the scala language, such as. A list of frequentlyasked questions about scala language features and their answers. Lambda calculus, category theory, closures, monads, functors, actors. This tutorial has been prepared for the beginners to help them understand programming language scala in simple and easy. Scala is a pure objectoriented language in the sense that every value is an object. A handy cheatsheet covering the basics of scala s syntax. Tutorial basics of functions and methods in scala datacamp.
If you dont have it installed, download java from oracle java 8, oracle java 11, or adoptopenjdk 811. Scala introduces several innovative language constructs. It is a pure objectoriented programming language which also provides the support to the functional programming approach. Introduction to scala scala is a generalpurpose, highlevel, multiparadigm programming language. This book is available in both paper and pdf ebook form. That being said, im assuming that you have a couple of languages under your belt now. Scala provides a lightweight syntax for defining anonymous functions, it supports higherorder functions, it allows functions to be nested, and supports currying functions. Scalas static types help avoid bugs in complex applications, and its jvm and javascript runtimes let you build highperformance systems with easy access to huge ecosystems of libraries.
Scala is a generalpurpose, highlevel, multiparadigm programming language. Scala is a relatively new language, but draws on many familiar concepts. Introduction to scala programming language journaldev. Pdf an overview of the scala programming language 2. Scala is a statically typed, objectoriented programming language that blends imperative and. About the tutorial scala tutorial scala is a modern multiparadigm programming language designed to express common programming patterns in a concise, elegant, and typesafe way. Scala language getting started with scala language. If you need a comprehensive and easy to follow manual for the scala language, the book programming in scala is the canonical reference text. This book is a tutorial for the scala programming language, written by peo. Scala tutorial pdf version quick guide resources job search discussion scala is a modern multiparadigm programming language designed to express common programming patterns in a concise, elegant, and typesafe way.
Both the functions and methods are a block of the reusable code also used to store the repeated code in one place, which makes a function call to performs a particular specific task. Scala is a modern multiparadigm programming language designed to express common programming patterns in a concise, elegant, and typesafe way. One of the biggest mistakes a java developer can make when learning scala is to jump in headfirst. It is neither a precise language reference nor a tutorial. Scala programs, i really appreciate that i dont have to decrypt cstyle type declarations. Scala, python, and java and more recently r and sparksql other libraries streaming, machine learning, graph processing percent of spark programmers who use each language 88% scala, 44% java, 22% python note. Supports importing libraries, tab completing, and all of the constructs in the language. It is particularly useful to programmers, data scientists, big data engineers, students, or just about anyone who wants to get up to speed fast with scala especially within an enterprise context. It is a pure objectoriented programming language which also provides support to the functional programming approach.