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Source file src/encoding/hex/example_test.go

Documentation: encoding/hex

  // Copyright 2016 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 hex_test
  
  import (
  	"encoding/hex"
  	"fmt"
  	"log"
  	"os"
  )
  
  func ExampleEncode() {
  	src := []byte("Hello Gopher!")
  
  	dst := make([]byte, hex.EncodedLen(len(src)))
  	hex.Encode(dst, src)
  
  	fmt.Printf("%s\n", dst)
  
  	// Output:
  	// 48656c6c6f20476f7068657221
  }
  
  func ExampleDecode() {
  	src := []byte("48656c6c6f20476f7068657221")
  
  	dst := make([]byte, hex.DecodedLen(len(src)))
  	n, err := hex.Decode(dst, src)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%s\n", dst[:n])
  
  	// Output:
  	// Hello Gopher!
  }
  
  func ExampleDecodeString() {
  	const s = "48656c6c6f20476f7068657221"
  	decoded, err := hex.DecodeString(s)
  	if err != nil {
  		log.Fatal(err)
  	}
  
  	fmt.Printf("%s\n", decoded)
  
  	// Output:
  	// Hello Gopher!
  }
  
  func ExampleDump() {
  	content := []byte("Go is an open source programming language.")
  
  	fmt.Printf("%s", hex.Dump(content))
  
  	// Output:
  	// 00000000  47 6f 20 69 73 20 61 6e  20 6f 70 65 6e 20 73 6f  |Go is an open so|
  	// 00000010  75 72 63 65 20 70 72 6f  67 72 61 6d 6d 69 6e 67  |urce programming|
  	// 00000020  20 6c 61 6e 67 75 61 67  65 2e                    | language.|
  }
  
  func ExampleDumper() {
  	lines := []string{
  		"Go is an open source programming language.",
  		"\n",
  		"We encourage all Go users to subscribe to golang-announce.",
  	}
  
  	stdoutDumper := hex.Dumper(os.Stdout)
  
  	defer stdoutDumper.Close()
  
  	for _, line := range lines {
  		stdoutDumper.Write([]byte(line))
  	}
  
  	// Output:
  	// 00000000  47 6f 20 69 73 20 61 6e  20 6f 70 65 6e 20 73 6f  |Go is an open so|
  	// 00000010  75 72 63 65 20 70 72 6f  67 72 61 6d 6d 69 6e 67  |urce programming|
  	// 00000020  20 6c 61 6e 67 75 61 67  65 2e 0a 57 65 20 65 6e  | language..We en|
  	// 00000030  63 6f 75 72 61 67 65 20  61 6c 6c 20 47 6f 20 75  |courage all Go u|
  	// 00000040  73 65 72 73 20 74 6f 20  73 75 62 73 63 72 69 62  |sers to subscrib|
  	// 00000050  65 20 74 6f 20 67 6f 6c  61 6e 67 2d 61 6e 6e 6f  |e to golang-anno|
  	// 00000060  75 6e 63 65 2e                                    |unce.|
  }
  
  func ExampleEncodeToString() {
  	src := []byte("Hello")
  	encodedStr := hex.EncodeToString(src)
  
  	fmt.Printf("%s\n", encodedStr)
  
  	// Output:
  	// 48656c6c6f
  }
  

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