alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (list.scala)

This example Scala source code file (list.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Scala tags/keywords

int, int, list, list, properties, properties, test, test

The Scala list.scala source code

import org.scalacheck._
import Prop._
import Gen._

object Test extends Properties("List") {
  def sorted(xs: List[Int]) = xs sortWith (_ < _)

  property("concat size") = forAll { (l1: List[Int], l2: List[Int]) => (l1.size + l2.size) == (l1 ::: l2).size }
  property("reverse") = forAll { (l1: List[Int]) => l1.reverse.reverse == l1 }
  property("toSet") = forAll { (l1: List[Int]) => sorted(l1.toSet.toList) sameElements sorted(l1).distinct }
  // property("flatten") = forAll { (xxs: List[List[Int]]) => xxs.flatten.length == (xxs map (_.length) sum) }
  property("startsWith/take") = forAll { (xs: List[Int], count: Int) => xs startsWith (xs take count) }
  property("endsWith/takeRight") = forAll { (xs: List[Int], count: Int) => xs endsWith (xs takeRight count) }
  property("fill") = forAll(choose(1, 100)) { count =>
    forAll { (x: Int) => 
      val xs = List.fill(count)(x)
      (xs.length == count) && (xs.distinct == List(x))
    }
  }
}

Other Scala examples (source code examples)

Here is a short list of links related to this Scala list.scala source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.