Well, I think he means you need'a figure it out for yourself, most commands are kinda obvious anyway..
This is what I think they mean:
addstring-Adds a string thats saved to the server
lindexof-Checks the array index
sarraylen- No idea
#I-The 'strequals' checking of an array
removestring-Removes the string from the player
deletestring-Deletes the string
replacestring-replaces it withsomething else
Im probly half wrong tho so oh well lol
/CaRnIe