Remove duplicates from Array in JavaScript

sureshMG...

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User: sureshMGR
Posted: on Apr 27, 2020 09:20 AM
Forum: JavaScript
Answer: 1
Views: 1694

Hi friends,

need to remove first duplicate value in array not second.

var names = ["A","B","C","D","E","B","F"];
var uniqueNames = [];
$.each(names, function(i, el){
 if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});

need to remove first duplicate value in array

expected output is:
var names = ["A","C","D","E","B","F"];

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dharmend...

0 2

Reply
ANSWER
User: dharmendr
Replied: on Apr 27, 2020 09:41 AM
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Hi sureshMGR,

Check the below sample.

HTML

<html>
<head>
    <title></title>
    <meta charset="utf-8" />
</head>
<body>
    <input type="button" value="Remove Duplicate" onclick="RemoveDuplicate()" />
    <script type="text/javascript">
        function RemoveDuplicate() {
            var names = ["A", "B", "C", "D", "E", "B", "F"];
            var uniqueNames = [];
            for (var i = 0; i < names.length; i++) {
                if (i == names.lastIndexOf(names[i])) {
                    uniqueNames.push(names[i]);
                }
            }
            alert(uniqueNames.join(","));
        }
    </script>
</body>
</html>

Demo

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Remove duplicates from Array in JavaScript

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