diff --git a/goextVersion.go b/goextVersion.go
index 7a1556c..50af877 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.390"
+const GoextVersion = "0.0.391"
 
-const GoextVersionTimestamp = "2024-02-21T16:11:15+0100"
+const GoextVersionTimestamp = "2024-02-21T16:18:04+0100"
diff --git a/langext/array.go b/langext/array.go
index 1b80cee..dcb4a87 100644
--- a/langext/array.go
+++ b/langext/array.go
@@ -265,6 +265,15 @@ func ArrFirstIndex[T comparable](arr []T, needle T) int {
 	return -1
 }
 
+func ArrFirstIndexFunc[T any](arr []T, comp func(v T) bool) int {
+	for i, v := range arr {
+		if comp(v) {
+			return i
+		}
+	}
+	return -1
+}
+
 func ArrLastIndex[T comparable](arr []T, needle T) int {
 	result := -1
 	for i, v := range arr {
@@ -275,6 +284,16 @@ func ArrLastIndex[T comparable](arr []T, needle T) int {
 	return result
 }
 
+func ArrLastIndexFunc[T any](arr []T, comp func(v T) bool) int {
+	result := -1
+	for i, v := range arr {
+		if comp(v) {
+			result = i
+		}
+	}
+	return result
+}
+
 func AddToSet[T comparable](set []T, add T) []T {
 	for _, v := range set {
 		if v == add {