if r == ch {
				return i
			}
		}
	}
	return -1
}

// LastIndexAny interprets s as a sequence of UTF-8-encoded Unicode code
// points. It returns the byte index of the last occurrence in s of any of
// the Unicode code points in chars. It returns -1 if chars is empty or if
// there is no code point in common.
func LastIndexAny(s []byte, chars string) int {
	if chars == "" {
		// Avoid scanning all of s.

	// Output:
	// 0
	// 3
	// -1
}

func ExampleLastIndexAny() {
	fmt.Println(bytes.LastIndexAny([]byte("go gopher"), "MüQp"))
	fmt.Println(bytes.LastIndexAny([]byte("go 地鼠"), "地大"))
	fmt.Println(bytes.LastIndexAny([]byte("go gopher"), "z,!."))
	// Output:
	// 5
	// 3
	// -1
}

func ExampleLastIndexByte() {