[笔记] Golang String

 1 package main
 2 
 3 import (
 4 "fmt"
 5 "strconv"
 6 "strings"
 7 )
 8 
 9 func main() {
10 // strings demo
11  Contains()
12  Join()
13  Index()
14  Repeat()
15  Replace()
16  Split()
17 
18 // strconv demo
19  AppendDemo()
20  FormatDemo()
21  ParseDemo()
22 }
23 
24 func Contains() {
25 fmt.Println(strings.Contains("seafood", "foo")) //true
26 fmt.Println(strings.Contains("seafood", "bar")) //false
27 }
28 
29 func Join() {
30 s := []string{"foo", "bar", "baz"}
31 fmt.Println(strings.Join(s, ",")) // foo,bar,baz
32 }
33 
34 func Index() {
35 fmt.Println(strings.Index("chicken", "ken")) // 4
36 fmt.Println(strings.Index("chicken", "dmr")) // -1
37 }
38 
39 func Repeat() {
40 fmt.Println("ba" + strings.Repeat("na", 2)) // banana
41 }
42 
43 func Replace() {
44 fmt.Println(strings.Replace("oink oink oink", "k", "ky", 2)) // oinky oinky oink
45 fmt.Println(strings.Replace("oink oink oink", "oink", "moo", -1)) // moo moo moo
46 }
47 
48 func Split() {
49 fmt.Printf("%q\n", strings.Split("a,b,c", ",")) //["a" "b" "c"]
50 fmt.Printf("%q\n", strings.Split("a man a plan a canal panama", "a ")) //["" "man " "plan " "canal panama"]
51 fmt.Printf("%q\n", strings.Split(" xyz ", "")) //[" " "x" "y" "z" " "]
52 fmt.Printf("%q\n", strings.Split("", "Bernardo O'Higgins")) //[""]
53 }
54 
55 func AppendDemo() {
56 str := make([]byte, 0, 100)
57 str = strconv.AppendInt(str, 4567, 10)
58 str = strconv.AppendBool(str, false)
59 str = strconv.AppendQuote(str, "abcdefg")
60 str = strconv.AppendQuoteRune(str, '单')
61 fmt.Println(string(str)) //4567false"abcdefg"'单'
62 }
63 
64 func FormatDemo() {
65 a := strconv.FormatBool(false)
66 b := strconv.FormatFloat(123.23, 'g', 12, 64)
67 c := strconv.FormatInt(1234, 10)
68 d := strconv.FormatUint(12345, 10)
69 e := strconv.Itoa(1023)
70 fmt.Println(a, b, c, d, e) // false 123.23 1234 12345 1023
71 }
72 
73 func ParseDemo() {
74 a, err := strconv.ParseBool("false")
75  handleErr(err)
76 b, err := strconv.ParseFloat("123,23", 64)
77  handleErr(err)
78 c, err := strconv.ParseInt("1234", 10, 64)
79  handleErr(err)
80 d, err := strconv.ParseUint("12345", 10, 64)
81  handleErr(err)
82 e := strconv.Itoa(1023)
83  handleErr(err)
84 fmt.Println(a, b, c, d, e) // false 0 1234 12345 1023
85 }
86 
87 func handleErr(err error) {
88 if err != nil {
89  fmt.Println(err)
90  }
91 }

有疑问加站长微信联系(非本文作者)

• 请尽量让自己的回复能够对别人有帮助
• 支持 Markdown 格式, **粗体**、~~删除线~~、`单行代码`
• 支持 @ 本站用户;支持表情(输入 : 提示),见 Emoji cheat sheet
• 图片支持拖拽、截图粘贴等方式上传