Removing duplicate values from multi dimensional array using JavaScript

On 05.08.09, In JavaScript, Programming, by admin

Tags: JavaScript

Introduction:

This article will helps you in removing any duplicate values from Multi Dimensional Array using simple JavaScript. Here I have used a simple logic, hope everyone can understand. Even, this article will help beginners in learn some simple tricks in JavaScript.

JavaScript Code:

<!-- Author: K.Vivekanand (http://www.developersnippets.com) -->
<!-- Contact: vivek@developersnippets.com -->
<script type="text/javascript">
var testArray = [
  [3, "Adobe"],
  [3, "Adobe India"],  
  [5, "Photoshop"],
  [4, "Flash"],
  [1, "Bridge"],
  [4, "Flash CS3"],
  [3, "Adobe Gumbo"]
];
 
var tempArray = new Array();
tempArray[0]=testArray[0];
	for(var i=0;i<testArray.length;i++)
	{
		var flag = true;
		for(var j=0;j<tempArray.length;j++)
		{
			if(tempArray[j][0]==testArray[i][0])
			{
				flag = false;
			}
		}//for loop
		if(flag==true)
		tempArray.push(testArray[i]);
	}//for loop
 
document.write(tempArray);
</script>

I am removing values depending on first element in the array that is 3,3,5,4,1,4,3. If you look at this one 3 and 4 are repeated twice. After applying simple logic, the output would be:

OutPut:

3,Adobe,5,Photoshop,4,Flash,1,Bridge

If you want to same concept for one dimensional array that is simple array, then you can view this article for reference – Remove duplicates from an array using JavaScript

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