fix: type/stringsutil: fix ToUpperFirst() for zero length input

grokify · Nov 23, 2024 · f1ba7b3 · f1ba7b3
1 parent e051164
commit f1ba7b3
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/type/stringsutil/stringsutil.go b/type/stringsutil/stringsutil.go
@@ -82,7 +82,9 @@ func ToUpperFirst(s1 string, lowerRest bool) string {
 		s1 = strings.ToLower(s1)
 	}
 	a1 := []rune(s1)
-	a1[0] = unicode.ToUpper(a1[0])
+	if len(a1) > 0 {
+		a1[0] = unicode.ToUpper(a1[0])
+	}
 	return string(a1)
 }