# limitations under the License.
# Highly specific, but useful, collections-related classes.
-module more_collections
+module more_collections is serialize
+
+import serialization
# Simple way to store an `HashMap[K, Array[V]]`
#
# assert hm2[2, "not-two"] == null
# ~~~~
class HashMap2[K1, K2, V]
+
private var level1 = new HashMap[K1, HashMap[K2, V]]
# Return the value associated to the keys `k1` and `k2`.
level2.keys.remove(k2)
end
+ # Is there a value at `k1, k2`?
+ fun has(k1: K1, k2: K2): Bool
+ do
+ if not level1.keys.has(k1) then return false
+ return level1[k1].keys.has(k2)
+ end
+
# Remove all items
fun clear do level1.clear
end
# assert hm3[2, "not-two", 22] == null
# ~~~~
class HashMap3[K1, K2, K3, V]
+
private var level1 = new HashMap[K1, HashMap2[K2, K3, V]]
# Return the value associated to the keys `k1`, `k2`, and `k3`.
level2.remove_at(k2, k3)
end
+ # Is there a value at `k1, k2, k3`?
+ fun has(k1: K1, k2: K2, k3: K3): Bool
+ do
+ if not level1.keys.has(k1) then return false
+ return level1[k1].has(k2, k3)
+ end
+
# Remove all items
fun clear do level1.clear
end