public var items : System.Collections.HashSet.<System.String>;
public var inv : System.Collections.HashSet.<System.String>;

function Start() {
        items = new System.Collections.HashSet.<System.String>();
        inv = new System.Collections.HashSet.<System.String>();

    items.Add("Apple");
        items.Add("Condom");
        items.Add("Bottle of Vodka");
        items.Add(".50 Hand Gun");
       // ^-- a good night out
}

function AddItem() {
    if(items.Contains("Apple") && !inv.Contains("Apple"))
        {
             items.Remove("Apple");
             inv.Add("Apple");
        }
}