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Merge Sort in JavaScript

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Submitted on: 11/16/2015 1:25:27 PM
By: Jake R. Pomperada  
Level: Beginner
User Rating: Unrated
Compatibility: JavaScript
Views: 990
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     A simple program that I wrote using JavaScript as my programming language that demonstrate Merge Sort algorithm. If you have some questions please send me an email at jake.r.pomperada@gmail.com and jakerpomperada@yahoo.com. My mobile number here in the Philippines is 09173084360.

 
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'**************************************
' Name: Merge Sort in JavaScript
' Description:A simple program that I wrote using JavaScript as my programming language that demonstrate Merge Sort algorithm.
If you have some questions please send me an email at jake.r.pomperada@gmail.com and jakerpomperada@yahoo.com. 
My mobile number here in the Philippines is 09173084360.
' By: Jake R. Pomperada
'**************************************

<html>
 <head>
<title> Merge Sort </title>
 </head>
<body> 
<script>
var values=[];
var a=0,b=0;
document.write("<font face='arial' size='4'>MERGE SORT </font>");
document.write("<br><br>");
 for (a=0; a<10; a++) {
 values.push(Number(prompt("Enter item value at no. " + (a+1))));
}
 document.write("<font face='arial' size='4'>Numbers");
 document.write(" given by the user </font>");
 document.write("<br><br>");
 for (a=0;a<10; a++) {
document.write("<font face='arial' size='4'> " +values[a] + "");
}
 
 function merge(left, right, arr) {
 var a = 0;
 
 while (left.length && right.length) {
arr[a++] = (right[0] < left[0]) ? right.shift() : left.shift();
 }
 while (left.length) {
arr[a++] = left.shift();
 }
 while (right.length) {
arr[a++] = right.shift();
 }
}
 
function mSort(arr, tmp, len) {
 if (len === 1) { 
 return; 
}
 
 var m = Math.floor(len / 2),
 tmp_l = tmp.slice(0, m),
 tmp_r = tmp.slice(m);
 
 mSort(tmp_l, arr.slice(0, m), m);
 mSort(tmp_r, arr.slice(m), len - m);
 merge(tmp_l, tmp_r, arr);
}
 
function merge_sort(arr) {
 mSort(arr, arr.slice(), arr.length);
}
 
 merge_sort(values); 
	 
 document.write("<br><br>");
	 document.write("<font face='arial' size='4'>Sorted List of Numbers </font>");
	 document.write("<br><br>");
 for (a=0; a<10; a++) {
document.write("<font face='arial' size='4'> " + values[a]+"</font>");
	
 } 
 
 </script>
 </body>
 </html> 


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