Java: избегайте вставки дубликатов в arraylist

Что случилось:

var albums = '';
var album_list = '';

$.each(data, function(i,item){
   var name = item.name;
   albums += '<li>'+item.name+'</li>';

   var album_content = {name: item.name, uid: 1};

   // at this point album_content is an object.. so it will be this string afterwards: "[object Object],"
   var album_content = album_content+',';

   album_list += album_content; //you're adding "[object Object],"


});

// album_list will now look like this: '["[object Object],[object Object],"]'
var album_list = '['+album_list+']';
localStorage.setItem("albums", JSON.stringify(album_list));
var albums_l = JSON.parse(localStorage.getItem("albums"));

$.each(albums_l, function(i,item){
   console.log(item.name);
});

Как это сделать правильно:

var albums = '';
var album_list = [];

$.each(data, function(i,item){
   var name = item.name;
   albums += '<li>'+item.name+'</li>';

   var album_content = {name: item.name, uid: 1};

   album_list.push(album_content);


});

localStorage.setItem("albums", JSON.stringify(album_list));
var albums_l = $.parseJSON(localStorage.getItem("albums"));

$.each(albums_l, function(i,item){
   console.log(item.name);
});