JavaScript array unique

In this Tutorial we want to describe a code that help you in understanding array unique. The program uses JavaScript as scripting language. The code try to explain you a HTML Page that include a script, inside the script the variable arr instantiate an array object. This variable is initialized with the array object element. The document. write print the Array before removing duplicate element.

Array.Array.Unique - This function return you the unique element with no duplicate element.

Finally the document. write print the array after removing duplicate element.

Javascript_array_unique.html

<html>

    <head>

        <title>JavaScript Array unique</title>

        <h1>JavaScript Array unique</h1>

        <hr></hr>

        <script  type="text/javascript">

            function unique(arrayName)

            {

                var newArray=new Array();

                label:for(var i=0; i<arrayName.length;i++ )

                {  

                    for(var j=0; j<newArray.length;j++ )

                    {

                        if(newArray[j]==arrayName[i]) 

                            continue label;

                    }

                    newArray[newArray.length] = arrayName[i];

                }

                return newArray;

            }

        </script>

        <script>

            var arr = new Array(0,2,4,2,6,4,8,6,10);

            document.write("Array before removing 

                  duplicate element: "+arr+"<br>");

            document.write("Array after removing 

                  duplicate element: "+unique(arr));

        </script>

        </head>

    <body>

        </body>

</html>

Output of the program

Download Source code