strings: Add IndexFunc example
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/42370043
diff --git a/src/pkg/strings/example_test.go b/src/pkg/strings/example_test.go
index 7350131..62a9af7 100644
--- a/src/pkg/strings/example_test.go
+++ b/src/pkg/strings/example_test.go
@@ -68,6 +68,17 @@
// -1
}
+func ExampleIndexFunc() {
+ f := func(c rune) bool {
+ return unicode.Is(unicode.Han, c)
+ }
+ fmt.Println(strings.IndexFunc("Hello, 世界", f))
+ fmt.Println(strings.IndexFunc("Hello, world", f))
+ // Output:
+ // 7
+ // -1
+}
+
func ExampleIndexRune() {
fmt.Println(strings.IndexRune("chicken", 'k'))
fmt.Println(strings.IndexRune("chicken", 'd'))
