Scala Tutorial Developing Modern Application
Scala is a modern programming language developed by Martin Odersky. It combines the best features of object-oriented and functional programming into a concise, logical, and potent tool for developing modern applications. Scala started as a research project at École Polytechnique Fédérale de Lausanne (EPFL), which has led to its use as an industrial-strength language for large-scale web services, enterprise applications, and even mobile apps.
WHAT IS SCALA
The Scala programming language is a Java virtual machine (JVM). Scala has been designed to be concise and flexible, emphasizing static types and extensible syntax. It combines object-oriented and functional programming, bringing forth the best aspects of both worlds.
Scala has many features that make it attractive for developing modern applications:
- Statically typed, compiled Scala. When you declare variables, you must describe their type, so the compiler understands what operations to do on them. If you try to add an integer to a string variable in Scala, the compiler won't let it since integers to strings violate its type system restrictions.
Scala programs are beautiful, type-safe, and succinct. This language combines OO and functional characteristics. Scala is fully compatible with Java; thus, you may utilize all Java libraries. Scala's high degree of abstraction and static typing let us write less code.
Using cloud computing and Hadoop, software engineers can design scalable apps with minimum resource utilization. These apps have low latency and good availability for millions or billions of users worldwide.
TYPES OF DATA STRUCTURES
You have a choice of data structures when you create a Scala program. The first three are:
- the immutable (unchanging) data structure, like the tuple
- the mutable (changeable) data structure, like the list and map
- an ordered collection of items, like the set
The fourth type is a sequence of elements. This is a way to represent an ordered list of items, but it's also more general than that: it can be used to represent any collection where each element has an index (e.g., the elements in a linked list). A Scala List is one example of a sequence; other examples are Array[Int] and Seq[User].
Functional language Scala. Methods can build functions inside objects or classes. Scala has first-class functions. If you've worked with Java, you'll discover that methods are identical to static methods: they can't be called with an instance of the class, just the class name.
In Scala, methods are declared within other methods, but functions aren't nested. If nesting exists, all definitions must be at the bottom (like classes).
Scala is a general-purpose programming language that expresses common patterns clearly and safely. Scala supports higher-order functions, immutability, pattern matching, algebraic data types (ADTs), slow evaluation, and tail recursion. Scala is a hybrid language since it enables static and dynamic typing. It lets developers program in a Java-like way while using functional language capabilities like higher-order functions and immutability.
Scala is one of the most flexible languages that are used for the development of modern applications. It is gaining more popularity among developers because of the functional programming paradigm.
The Scala development team has made extraordinary efforts to define a platform that can make the functional programming paradigm easy and effective. Scala is more expressive; it needs minimal learning resources and time. Let's learn Scala together with Cogent University.