Functional Kotlin

Generating Streams – Stream.generate()

We can also create a Stream by using the Stream.generate() factory method. It accepts a lambda/supplier instance as a parameter, and will use it to generate the item for each time the item is demanded. This method also creates an infinite Stream.

Consider the following example:

  fun main(args: Array<String>) { 
      val stream = Stream.generate { 
          //return a random number 
          (1..20).random() 
      } 
      val resultantList = stream 
              .limit(10) 
              .collect(Collectors.toList()) 
      println("resultantList = $resultantList") 
  } 

The output is as follows:

So, the Stream API called the lambda to get each of the elements of the Stream—awesome. ...