var a = [{"id":1, "item": 213}];
var b = [{"id":1, "item": 213}, {"id":78, "item": 21}, {"id":19, "item": 13}];
var result = a.filter(function(v) {
return b.some(function(v2) {
return v.id == v2.id && v.item == v2.item;
}
});
console.log(result);
