lots more generics

vendor/github.com/jesseduffield/generics/maps/maps.go

@@ -0,0 +1,35 @@
+package maps
+
+func Keys[Key comparable, Value any](m map[Key]Value) []Key {
+	keys := make([]Key, 0, len(m))
+	for key := range m {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func Values[Key comparable, Value any](m map[Key]Value) []Value {
+	values := make([]Value, 0, len(m))
+	for _, value := range m {
+		values = append(values, value)
+	}
+	return values
+}
+
+func TransformValues[Key comparable, Value any, NewValue any](
+	m map[Key]Value, fn func(Value) NewValue,
+) map[Key]NewValue {
+	output := make(map[Key]NewValue)
+	for key, value := range m {
+		output[key] = fn(value)
+	}
+	return output
+}
+
+func TransformKeys[Key comparable, Value any, NewKey comparable](m map[Key]Value, fn func(Key) NewKey) map[NewKey]Value {
+	output := make(map[NewKey]Value)
+	for key, value := range m {
+		output[fn(key)] = value
+	}
+	return output
+}