home | career | drupal | java | mac | mysql | perl | scala | uml | unix

Groovy example source code file (binarytrees.groovy)

This example Groovy source code file (binarytrees.groovy) 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 - Groovy tags/keywords

treenode, treenode

The Groovy binarytrees.groovy source code

/* The Computer Language Benchmarks Game
   http://shootout.alioth.debian.org/
   contributed by Jochen Hinrichsen
   modified by Marko Kocic
*/

final class TreeNode {
   private final left, right, item

   TreeNode(item){
      this.item = item
   }

   private static bottomUpTree(item, depth) {
      if (depth>0) {
      return new TreeNode(
           bottomUpTree(2*item-1, depth-1)
         , bottomUpTree(2*item, depth-1)
         , item
         )
      } else {
      	return new TreeNode(item)
      }
   }

   TreeNode(left, right, item){
      this.left = left
      this.right = right
      this.item = item
   }

   private itemCheck(){
      // if necessary deallocate here
      if (left==null) return item
      else return item + left.itemCheck() - right.itemCheck()
   }
}


def n = (args.length == 0) ? 10 : args[0].toInteger()
def minDepth = 4
def maxDepth = [ minDepth + 2, n].max()
def stretchDepth = maxDepth + 1

def check = (TreeNode.bottomUpTree(0,stretchDepth)).itemCheck()
println "stretch tree of depth ${stretchDepth}\t check: ${check}"

def longLivedTree = TreeNode.bottomUpTree(0,maxDepth)

def depth=minDepth
while (depth<=maxDepth) {
   def iterations = 1 << (maxDepth - depth + minDepth)
   check = 0
   for (i in 1..iterations) {
      check += (TreeNode.bottomUpTree(i,depth)).itemCheck()
      check += (TreeNode.bottomUpTree(-i,depth)).itemCheck()
   }

   println "${iterations*2}\t trees of depth ${depth}\t check: ${check}"
   depth+=2
}

println "long lived tree of depth ${maxDepth}\t check: ${longLivedTree.itemCheck()}"

Other Groovy examples (source code examples)

Here is a short list of links related to this Groovy binarytrees.groovy source code file:

new blog posts

 

Copyright 1998-2013 Alvin Alexander, alvinalexander.com
All Rights Reserved.