getUniqueArrayCreator.js

'use strict';
let getUniqueArrayCreator = () => {
  let store = new Set();
  return ({
    add: function(...array) {
      if (!array) {
        return;
      }
      array.forEach(function(item) {
        if(!item && item === '') {
          return;
        }
        store.add(item.trim());
      });
    },
    create: function() {
      return [...store.values()];
    }
  })
};