Created
March 17, 2014 01:50
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BST, insert, insert from sorted array, rangeSeach
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"use strict"; | |
/*jshint -W055 */ | |
/*jshint -W098 */ | |
/* | |
var BST = function BST(){ | |
var root; | |
function constructor(){ | |
this.root = {}; | |
} | |
constructor.prototype.insert = function(node, value){ | |
console.log(node); | |
if (node || node === null){ | |
console.log("made it here"); | |
node = new TreeNode(value); | |
} | |
if (value <= node){ | |
console.log("less than"); | |
this.insert(node.left, value); | |
} | |
if (value > node) { | |
console.log("greater than"); | |
this.insert(node.right, value); | |
} | |
}; | |
constructor.prototype.rangeSearch = function(min, max){ | |
}; | |
return new constructor(); | |
}; | |
*/ | |
var TreeNode = require("./TreeNode").TreeNode; | |
var BST = function BST() { | |
var root; | |
function constructor() { | |
this.root = new TreeNode(null); | |
} | |
constructor.prototype.insert = function(node, value) { | |
if (node.value === null) { | |
node.value = value; | |
return true; | |
} | |
if (node.value > value) { | |
if(node.left === null) | |
node.left = new TreeNode(null); | |
return this.insert(node.left, value); | |
} | |
if (node.value <= value) { | |
if(node.right === null) | |
node.right = new TreeNode(null); | |
return this.insert(node.right, value); | |
} | |
}; | |
constructor.prototype.arrayToBST = function(array) { | |
var middle = Math.floor(array.length/2); | |
this.insert(this.root, array[middle]); | |
for (var i = 1; i < middle+1; i++){ | |
this.insert(this.root, array[middle + i]); | |
this.insert(this.root, array[middle - i]); | |
} | |
}; | |
constructor.prototype.rangeSearchBST = function (node, min, max) { | |
var acc = { | |
acc:[] | |
}; | |
this.rangeSearchBST_h(acc, node, min, max); | |
return acc.acc; | |
}; | |
constructor.prototype.rangeSearchBST_h = function (acc, node, min, max) { | |
if (node.left && node.left.value >= min) | |
this.rangeSearchBST_h(acc, node.left, min, max); | |
acc.acc.push(node.value); | |
if (node.right && node.right.value <= max) | |
this.rangeSearchBST_h(acc, node.right, min, max); | |
return; | |
}; | |
return new constructor(); | |
}; | |
var array = [1,5,6,22,34,46,48,51,63,69,72,83,95]; | |
var bst = new BST(); | |
bst.arrayToBST(array); | |
var cooler = bst.rangeSearchBST(bst.root, 7, 64); | |
console.log(JSON.stringify(cooler)); |
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