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"
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