Created
July 17, 2018 21:35
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Binary Tree
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<!DOCTYPE html> | |
<html> | |
<body> | |
<canvas id="myCanvas" width="600" height="600" style="border:1px solid #d3d3d3;"> | |
Your browser does not support the HTML5 canvas tag.</canvas> | |
<script> | |
var c = document.getElementById("myCanvas"); | |
var ctx = c.getContext("2d"); | |
ctx.font = "18px serif"; | |
ctx.textBaseline = "middle"; | |
ctx.textAlign = "center"; | |
var width = c.width; | |
var height = c.height; | |
var cx = width/2; | |
var cy = height/2; | |
function text(txt,x,y){ | |
var str = txt.toString(); | |
ctx.fillText(str.split("").join(String.fromCharCode(8202)),x,y); | |
} | |
function circleWithText(x,y){ | |
ctx.beginPath(); | |
ctx.arc(x,y,30,0,2*Math.PI); | |
ctx.stroke(); | |
return function(txt){ | |
text(txt, x,y); | |
} | |
} | |
//circleWithText(cx,100)("10"); | |
function isEmpty(obj) { | |
for(var prop in obj) { | |
if(obj.hasOwnProperty(prop)) | |
return false; | |
} | |
return JSON.stringify(obj) === JSON.stringify({}); | |
} | |
var a = [10,3,15,5,7,24,6,12,9]; | |
function Node(_value, _rootNode = false){ | |
this.left = {}; | |
this.right = {}; | |
this.value = _value; | |
this.rootNode = _rootNode; | |
} | |
function Tree(){ | |
this.rootNode; | |
} | |
Tree.prototype.addRootNode = function(node) { | |
var value = node.value; | |
if(this.rootNode && this.rootNode.value === value ) { | |
console.log('Duplicate Root Node => ', value); | |
return; | |
} | |
if(this.rootNode === undefined){ | |
var root = new Node(value, true); | |
console.log('Root Node added => ',value); | |
this.rootNode = root; | |
} | |
} | |
Tree.prototype.addNode = function(node, _selectedNode) { | |
var value = node.value; | |
var selectedNode = _selectedNode; | |
if(_selectedNode === undefined) { | |
selectedNode = this.rootNode; | |
} | |
if(selectedNode && selectedNode.value === value ) { | |
console.log('Duplicate Child Node => ', value); | |
return; | |
} | |
if(value < selectedNode.value) { | |
if(isEmpty(selectedNode.left)){ | |
console.log('Added Children node to LEFT => ',value); | |
selectedNode.left = node; | |
} else{ | |
this.addNode(node, selectedNode.left); | |
} | |
} | |
if(value > selectedNode.value) { | |
if(isEmpty(selectedNode.right)){ | |
console.log('Added Children node to RIGHT => ',value); | |
selectedNode.right = node; | |
} else { | |
this.addNode(node, selectedNode.right); | |
} | |
} | |
}; | |
Tree.prototype.traverse = function(node, _selectedNode) { | |
} | |
var tree = new Tree(); | |
tree.addRootNode(new Node(20)); | |
tree.addNode(new Node(200)); | |
tree.addNode(new Node(200)); | |
tree.addNode(new Node(2)); | |
tree.addNode(new Node(201)); | |
tree.addNode(new Node(10)); | |
tree.addNode(new Node(10)); | |
tree.traverse(); | |
console.log(tree) | |
</script> | |
</body> | |
</html> |
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