How to clone an array using JavaScript Function ?

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Write a JavaScript function to clone an array.

Test Data :
console.log(array_Clone([1, 2, 4, 0]));
console.log(array_Clone([1, 2, [4, 0]]));
[1, 2, 4, 0]
[1, 2, [4, 0]]

Solution:

var is_array = function(input) {
  if (toString.call(input) === "[object Array]")
    return true;
  return false;   
    };
console.log(is_array('CodeDixa'));
console.log(is_array([1, 2, 4, 0]));
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