diff --git a/goextVersion.go b/goextVersion.go
index ed5236a..cc79826 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.240"
+const GoextVersion = "0.0.242"
 
-const GoextVersionTimestamp = "2023-08-14T15:36:12+0200"
+const GoextVersionTimestamp = "2023-08-14T16:05:12+0200"
diff --git a/langext/array.go b/langext/array.go
index 952d288..fb08de7 100644
--- a/langext/array.go
+++ b/langext/array.go
@@ -467,3 +467,15 @@ func ArrayToInterface[T any](t []T) []interface{} {
 	}
 	return res
 }
+
+func JoinString(arr []string, delimiter string) string {
+	str := ""
+	for i, v := range arr {
+		str += v
+		if i < len(arr)-1 {
+			str += delimiter
+		}
+	}
+
+	return str
+}
diff --git a/langext/array_test.go b/langext/array_test.go
new file mode 100644
index 0000000..7c42b2b
--- /dev/null
+++ b/langext/array_test.go
@@ -0,0 +1,12 @@
+package langext
+
+import (
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"testing"
+)
+
+func TestJoinString(t *testing.T) {
+	ids := []string{"1", "2", "3"}
+	res := JoinString(ids, ",")
+	tst.AssertEqual(t, res, "1,2,3")
+}
diff --git a/langext/base58_test.go b/langext/base58_test.go
index 02fd341..da6ae23 100644
--- a/langext/base58_test.go
+++ b/langext/base58_test.go
@@ -60,9 +60,3 @@ func TestBase58FlickrDecoding(t *testing.T) {
 	tst.AssertEqual(t, _decStr(t, Base58FlickrEncoding, "9aJCVZR"), "Hello")
 	tst.AssertEqual(t, _decStr(t, Base58FlickrEncoding, "48638rmBiUzG5NKQoX4KcuE5C8paCFACnE28F7qDx13PRtennAmYSSJQ5gJSRihf5ZDyEQS4UimtihR7uARt4wbty2fW9duTQTM9n1DwUBevreyzGwu6W4YSgrvQgCPDxsiE1mCdZsF8VEBpuHHEiJyw"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
 }
-
-func assertEqual(t *testing.T, actual string, expected string) {
-	if actual != expected {
-		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
-	}
-}