golang example_test 代码
文件路径：/src/path/filepath/example_test.go
/ Copyright 2017 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package filepath_test
import (
"fmt"
"path/filepath"
)
func ExampleExt() {
fmt.Printf("No dots: %q\n", filepath.Ext("index"))
fmt.Printf("One dot: %q\n", filepath.Ext("index.js"))
fmt.Printf("Two dots: %q\n", filepath.Ext("main.test.js"))
/ Output:
/ No dots: ""
/ One dot: ".js"
/ Two dots: ".js"
}