// Copyright 2011 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 bytes_test import (	"bytes"	"encoding/base64"	"fmt"	"io"	"os"	"sort") func ExampleBuffer() {	var b bytes.Buffer // A Buffer needs no initialization.	b.Write([]byte("Hello "))	fmt.Fprintf(&b, "world!")	b.WriteTo(os.Stdout)	// Output: Hello world!} func ExampleBuffer_reader() {	// A Buffer can turn a string or a []byte into an io.Reader.	buf := bytes.NewBufferString("R29waGVycyBydWxlIQ==")	dec := base64.NewDecoder(base64.StdEncoding, buf)	io.Copy(os.Stdout, dec)	// Output: Gophers rule!} func ExampleCompare() {	// Interpret Compare's result by comparing it to zero.	var a, b []byte	if bytes.Compare(a, b) < 0 {		// a less b	}	if bytes.Compare(a, b) <= 0 {		// a less or equal b	}	if bytes.Compare(a, b) > 0 {		// a greater b	}	if bytes.Compare(a, b) >= 0 {		// a greater or equal b	} 	// Prefer Equal to Compare for equality comparisons.	if bytes.Equal(a, b) {		// a equal b	}	if !bytes.Equal(a, b) {		// a not equal b	}} func ExampleCompare_search() {	// Binary search to find a matching byte slice.	var needle []byte	var haystack [][]byte // Assume sorted	i := sort.Search(len(haystack), func(i int) bool {		// Return haystack[i] >= needle.		return bytes.Compare(haystack[i], needle) >= 0	})	if i < len(haystack) && bytes.Equal(haystack[i], needle) {		// Found it!	}} func ExampleTrimSuffix() {	var b = []byte("Hello, goodbye, etc!")	b = bytes.TrimSuffix(b, []byte("goodbye, etc!"))	b = bytes.TrimSuffix(b, []byte("gopher"))	b = append(b, bytes.TrimSuffix([]byte("world!"), []byte("x!"))...)	os.Stdout.Write(b)	// Output: Hello, world!} func ExampleTrimPrefix() {	var b = []byte("Goodbye,, world!")	b = bytes.TrimPrefix(b, []byte("Goodbye,"))	b = bytes.TrimPrefix(b, []byte("See ya,"))	fmt.Printf("Hello%s", b)	// Output: Hello, world!}