Functional Kotlin

Working with Streams

So, we learned a lot of theories regarding Streams, and we also learned that Streams have a set of functional interfaces to work with (actually, the functional interfaces is the only way to work with Streams), but as I mentioned before, they work in a slightly different way than the Collections API.

To make things clearer, have a look back at the following example:

  fun main(args: Array<String>) { 
      val stream = 1.rangeTo(10).asSequence().asStream() 
       val resultantList = stream.filter{ 
          it%2==0 
      }.collect(Collectors.toList()) 
      println(resultantList) 
  } 

The preceding program is a simple one; we just grabbed a stream of numbers 1 through 10 and filtered out the odd numbers from that stream, and then collected the results inside ...