As far as Exolent told me, Tries allows you to index arrays with strings instead of numbers
Heres a brief concept map:
Code:
// this is not real coding, it just gives you an idea of what tries do
my_trie["gamer99"]=89
my_trie["Arkshine"]= my_key
// Tries also support strings
my_trie["Arkshine"]="my string"
Note that you have to know what the key data type is before you retrieve it.