In abstraction you mean let`s say it prereserves a cells in memory that are expected to be either full or empty so when I tell him, "perl I want a key name1, which I don`t remember if I sotred.", he looks into some 0xFF00BB3012, which expects to be in the memory for the hash and tells me: "nope, I don`t have what you want in that address location so I won`t give you the coresponding value from the coresponding address." Quite abstract stuff, but as far as I got it, perl kind of flags these addresses and then directly access them with lowlevel operations which are too much for me to bear...
