how to remove duplicate elements from array and keep single copy code example

Example 1: javascript remove duplicates from array

unique = [...new Set(arr)];   // where arr contains duplicate elements

Example 2: removing duplicates from array javascript

var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"];
var uniqueNames = [];
$.each(names, function(i, el){
    if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});