Add map compactor

maputils/mapUtils.go

@@ -71,3 +71,15 @@ func CompareMap[K, V comparable](a, b map[K]V) bool {
 	}
 	return true
 }
+
+func Compact[K comparable, V any](
+	m map[K]V,
+	compactor func(accK K, accV V, nextK K, nextV V) (K, V),
+) (K, V) {
+	var accK K
+	var accV V
+	for k, v := range m {
+		accK, accV = compactor(accK, accV, k, v)
+	}
+	return accK, accV
+}