Scala and Spark for Big Data Analytics

Implicit conversions in Scala

An implicit conversion from type S to type T is defined by an implicit value that has function type S => T, or by an implicit method convertible to a value of that type. Implicit conversions are applied in two situations (source: http://docs.scala-lang.org/tutorials/tour/implicit-conversions):

• If an expression e is of type S, and S does not conform to the expression's expected type T
• In a selection e.m with e of type S, if the selector m does not denote a member of S.

Well, we have seen how to use infix operator in Scala. Now, let's see some use cases of Scala implicit conversion. Suppose we have the following code segment:

class Complex(val real: Double, val imaginary: Double) { def plus(that: Complex) = new ...