As in other functional programming languages, in Scala, functions are first-class citizens (meaning you can pass them as values), and Scala also supports anonymous functions and currying (partial application of multi-argument functions). Scala enough to give you a preview of Scala's power and capabilities and whet your appetite for learning the language. This Spark certification training course helps you master both the essential skills of the open source Apache Spark framework and the scala programming language. This combination of features makes it possible to write Scala programs that are quite concise and elegant.
Together with the superior functional programming idioms available to take advantage of multi-core CPU architectures, Scala has the right mix of the popular object-oriented paradigm. Scala is a type-safe JVM language that incorporates both object-oriented and functional programming in an extremely concise, logical and extraordinarily powerful language. But it should not be ignored that the same features that make Scala's version so productive can also hinder scala vs java performance and make it much more catastrophic than it needs to be. For a Java developer, learning a classical functional programming language like Haskell or OCaml is significantly more difficult than Scala.
The popularity and use of Scala is growing rapidly, as evidenced by the increasing number of vacancies for Scala developers. Companies that have started using Scala are also contributing to the recent growth of Scala as a mainstream language. In fact, the difference between the use of collections in Java and Scala, in terms of built-in functionality, is so stark that it is usually very rare to find "for loops" in Scala code - they are simply a sub-optimal way of applying operations to collections in most cases. For those who are hearing about Scala for the first time - or who have heard of it only in passing - let's start with a brief look at the history of Scala.
In my opinion, for Scala to grow as a real Java alternative, given that Java 8 also has functional programming support, it needs to attract more and more Java developers. One thing you may not know about Scala is that it was originally developed at the Swiss university EPFL in an attempt to apply recent innovations in programming language research to a language that could gain traction in the mainstream, such as Java. With a growing Scala community on the forums, it's not hard to find an answer to any question about Scala, which adds to your learning experience.