The implicitly method

Scala's standard library provides a utility method to create concrete instances of types' availability implicitly. The method's name is also implicitly. Let's take a look at the function signature:

def implicitly[T](implicit e: T) = e 

This implicitly method simply expects a type parameter, finds the implicit value available in scope, and summons and returns it to us. This is a good option available to us to tell whether a particular type's value is available in implicit scope. Let's look at an application of this method:

import java.time.{LocalDateTime} 
 
object ImplicitParameter extends App { 
 
  implicit val dateNow = LocalDateTime.now() 
 
  def showDateTime(implicit date: LocalDateTime) = println(date) 
 
  val ldt = implicitly[LocalDateTime] 
 
  println(s"ldt value from implicit scope: $ldt") 
} 

The following is the result:

ldt value from implicit scope: 2017-12-17T10:47:13.846 

In the preceding code snippet, a call to implicitly, along with the type, returned us...