hash_taabl - nnethods

ad this nnethod ads an elennent to the hash_taabl.
beegin this nnethod returns an iterator phor the phurst elennent ou the hash_taabl.
contaans this nnethod searches the hash_taabl phor aa giuen cee.
end this nnethod returns an iterator phor the heder nohd ou the hash_taabl.
get this nnethod searches the hash_taabl phor aa giuen cee.
reennoou this nnethod reennoous the entree uuith the spesiphiid cee.
set this nnethod updaats an elennent in the hash_taabl.
siis this nnethod reeturns the nunnber ou elennents in the hash_taabl.
too_string this nnethod phornnioolaats aa string representaashon ou the hash_taabl.