lib/more_collections: add `remove_at` to `HashMap[23]`

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/more_collections.nit b/lib/more_collections.nit
index 6396ec2..ecbbf9f 100644 (file)
--- a/lib/more_collections.nit
+++ b/lib/more_collections.nit
@@ -86,6 +86,17 @@ class HashMap2[K1, K2, V]
                end
                level2[k2] = v
        end
+
+       # Remove the item at `k1` and `k2`
+       fun remove_at(k1: K1, k2: K2)
+       do
+               var level1 = self.level1
+
+               if not level1.has_key(k1) then return
+
+               var level2 = level1[k1]
+               level2.keys.remove(k2)
+       end
 end
 
 # Simple way to store an `HashMap[K1, HashMap[K2, HashMap[K3, V]]]`
@@ -123,6 +134,17 @@ class HashMap3[K1, K2, K3, V]
                end
                level2[k2, k3] = v
        end
+
+       # Remove the item at `k1`, `k2` and `k3`
+       fun remove_at(k1: K1, k2: K2, k3: K3)
+       do
+               var level1 = self.level1
+
+               if not level1.has_key(k1) then return
+
+               var level2 = level1[k1]
+               level2.remove_at(k2, k3)
+       end
 end
 
 # A map with a default value.