v0.0.123

langext/maps.go

@@ -1,5 +1,10 @@
 package langext
 
+type MapEntry[T comparable, V any] struct {
+	Key   T
+	Value V
+}
+
 func MapKeyArr[T comparable, V any](v map[T]V) []T {
 	result := make([]T, 0, len(v))
 	for k := range v {
@@ -8,6 +13,14 @@ func MapKeyArr[T comparable, V any](v map[T]V) []T {
 	return result
 }
 
+func MapValueArr[T comparable, V any](v map[T]V) []V {
+	result := make([]V, 0, len(v))
+	for _, mv := range v {
+		result = append(result, mv)
+	}
+	return result
+}
+
 func ArrToMap[T comparable, V any](a []V, keyfunc func(V) T) map[T]V {
 	result := make(map[T]V, len(a))
 	for _, v := range a {
@@ -16,6 +29,17 @@ func ArrToMap[T comparable, V any](a []V, keyfunc func(V) T) map[T]V {
 	return result
 }
 
+func MapToArr[T comparable, V any](v map[T]V) []MapEntry[T, V] {
+	result := make([]MapEntry[T, V], 0, len(v))
+	for mk, mv := range v {
+		result = append(result, MapEntry[T, V]{
+			Key:   mk,
+			Value: mv,
+		})
+	}
+	return result
+}
+
 func CopyMap[K comparable, V any](a map[K]V) map[K]V {
 	result := make(map[K]V, len(a))
 	for k, v := range a {
@@ -23,3 +47,11 @@ func CopyMap[K comparable, V any](a map[K]V) map[K]V {
 	}
 	return result
 }
+
+func ForceMap[K comparable, V any](v map[K]V) map[K]V {
+	if v == nil {
+		return make(map[K]V, 0)
+	} else {
+		return v
+	}
+}