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How to extend an existing JavaScript array with another array?
To extend an existing array in JavaScript, use the Array.concat() method.
Example
You can try to run the following code to extend an existing JavaScript array with another array:
<html>
<head>
<title>JavaScript Array push Method</title>
</head>
<body>
<script>
var numbers = new Array(1, 4, 9);
var numbers2 = new Array(2, 5);
numbers = numbers.concat(numbers2);
document.write("new numbers is : " + numbers );
</script>
</body>
</html>Output
new numbers is : 1,4,9,2,5
Updated on 18-Jun-2020 06:59:32
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