You can remove duplicate items from array in javascript using below methods:
1- Using filter function:
var items = ["1", "2", "3", "1", "2", "4"];
var newArray = items.filter(function(item, index, items){
return items.indexOf(item) === index }
);
2- Using core javascript logic:
function removeDuplicateItems(arr) {
var tempArr = {};
for (var i = 0; i < arr.length; i++)
tempArr[arr[i]] = true;
return Object.keys(tempArr);
}
Both the ways can be used to remove duplicate items and use in your code solve the duplicacy problem.
