Scala Lang Tour

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Operators Tour of Scala Scala Documentation

https://docs.scala-lang.org/tour/operators.html

Tour of Scala. Operators. Language. In Scala, operators are methods. Any method with a single parameter can be used as an infix operator. For example, + can be called with dot-notation: 10.+(1) However, it’s easier to read as an infix operator: 10 + 1 Defining and using operators.

A Tour of Scala The Scala Programming Language

https://www.scala-lang.org/old/node/104.html

Scala is also a functional language in the sense that every function is a value.Scala provides a lightweight syntax for defining anonymous functions, it supports higher-order functions, it allows functions to be nested, and supports currying.Scala's case classes and its built-in support for pattern matching model algebraic types used in many functional programming languages.

A Tour of Scala: Variances The Scala Programming Language

https://www.scala-lang.org/node/129

Scala supports variance annotations of type parameters of generic classes.In contrast to Java 5 (aka. JDK 1.5), variance annotations may be added when a class abstraction is defined, whereas in Java 5, variance annotations are given by clients when a class abstraction is used.. In the page about generic classes an example for a mutable stack was given.

Compound Types Tour of Scala - Scala Documentation

https://docs.scala-lang.org/tour/compound-types.html

The question arises what the type of the parameter obj is. If it’s Cloneable then the object can be cloned, but not reset; if it’s Resetable we can reset it, but there is no clone operation. To avoid type casts in such a situation, we can specify the type of obj to be both Cloneable and Resetable.This compound type is written like this in Scala: Cloneable with Resetable.

The Scala Programming Language

https://scala-lang.org/

Scala began life in 2003, created by Martin Odersky and his research group at EPFL, next to Lake Geneva and the Alps, in Lausanne, Switzerland. Scala has since grown into a mature open source programming language, used by hundreds of thousands of developers, and is developed and maintained by scores of people all over the world.

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