-- insert a pair into a map
map_insert(assoc, pair) -> pair :: assoc.

-- lookup by key
map_lookup([], _) -> ("nothing",).
map_lookup((k,v)::xs, key) ->
	if k == key then ("just", v)
	else map_lookup(xs, key).

-- remove a key from a map
map_remove([], key) -> [].
map_remove((k,v)::xs, key) ->
	if k == key then xs
	else (k,v) :: map_remove(xs, key).

m = [].
m = map_insert(m, ("hi", "there")).
m = map_insert(m, ("k", "v")).
m = map_insert(m, ("ready", "go")).

print(m).
print(map_remove(m, "k")).
("just", x) = map_lookup(m, "hi").
("nothing",) = map_lookup(m, "foo").
print(x).