[Haskell-cafe] Re: Bi-directional Maps

[Hugh Perkins]

Just noticed, erlang has the second kind of bimap (a "bijection"?)
built into each process:

>From http://www.erlang.org/doc/reference_manual/processes.html :

"10.9 Process Dictionary

Each process has its own process dictionary, accessed by calling the
following BIFs:

put(Key, Value)
get(Key)
get()
get_keys(Value)
erase(Key)
erase()"

That's interesting.