Please try:
Example that uses no libraries. This requires two new prototype functions, contains and unique
Array.prototype.contains = function(v) {
for(var i = 0; i < this.length; i++) {
if(this[i] === v) return true;
}
return false;
};
Array.prototype.unique = function() {
var arr = [];
for(var i = 0; i < this.length; i++) {
if(!arr.contains(this[i])) {
arr.push(this[i]);
}
}
return arr;
}
You can then do:
var duplicates = [1,3,4,2,1,2,3,8];
var uniques = duplicates.unique();
For more reliability, you can replace contains with MDN's indexOf shim and check if each element's indexOf is equal to -1: https:
Example from:
click here