标签:统计 itoa hello upper err tin jpg i++ equal
1.统计字符串的长度,按字节len(str)
str := "hello北京" fmt.Println("str len=", len(str))
2.字符串遍历,同时处理有中文的问题 r := []rune(str)
str2 := "hello北京" r := []rune(str2) for i := 1; i < len(r); i++ { fmt.Printf("字符=%c\n", r[i]) }
3.字符串转整数: n, err := strconv.Atoi("12")
n, err := strconv.Atoi("5656") if err != nil{ fmt.Println("转换错误", err) }else { fmt.Println("转成的结果是", n) }
4.整数转字符串 str = strconv.Itoa(12345)
str = strconv.Itoa(123456) fmt.Printf("str=%v, str=%T", str, str)
5.字符串转 []byte: var bytes = []byte("hello go")
var bytes = []byte("hello go") fmt.Printf("bytes=%v\n", bytes)
6.[]byte 转字符串: str = string([]byte{97, 98, 99})
str = string([]byte{97, 98, 99}) fmt.Printf("str=%v\n", str)
7.10进制转2,8,16进制: str = strconv.FormatInt(123, 2)
str := strconv.FormatInt(123, 2) fmt.Printf("123对应的二进制是=%v\n", str) str = strconv.FormatInt(123, 16) fmt.Printf("123对应的16进制是=%v\n", str)
8.查找子串是否在指定的字符串中:strings.Contains("seafood", "foo")
b := strings.Contains("seafood", "abc") fmt.Printf("b=%v\n", b)
9.统计一个字符串有几个指定的子串: strings.Count("ceheese", "e")
num := strings.Count("ceheese", "e") fmt.Printf("num=%v\n", num)
10.不区分大小写的字符串比较(==是区分字母大小写的):fmt.Println(strings.EqualFold("abc", "Abc"))
b = strings.EqualFold("abc", "Abc") fmt.Printf("b=%v\n", b)
11.返回子串在字符串第一次出现的index值,如果没有返回-1:strings.Index("NLT_abc", "abc")
index = strings.Index("NLT_abcabcabc", "abc")
fmt.Printf("index=%v\n", index)
12.返回子串在字符串最后一次出现的index,如果没有返回-1:strings.LastIndex("go golang", "go")
index := strings.LastIndex("go golang", "go") fmt.Printf("index=%v\n", index)
13.将指定的子串替换成另外一个子串:strings.Replace("go lgo hello", "go", "python", n)n可以指定你希望替换几个,如果n= -1表示全部替换
str2 := "go go hello" str := strings.Replace(str2, "go", "python", -1) fmt.Printf("str=%v str2=%v\n", str, str2)
14.按照指定的某个字符,为分割标识,将一个字符串拆分成字符串数组,strings.Split("hello, wrold, ok", ",")
strArr := strings.Split("hello,world,ok", ",") for i := 0; i < len(strArr); i++ { fmt.Printf("str[%v]=%v\n", i, strArr[i]) } fmt.Printf("strArr=%v\n", strArr)
15.将字符串的字母进行大小写的转换:strings.ToLower("Go") // strings.ToUpper("Go")
str := "goLange Hello" //str = strings.ToLower(str) str = strings.ToUpper(str) fmt.Printf("str=%v\n", str)
16.将字符串左右两边的空格去掉:strings.TrimSpace(" tn a long gopher ntrn ")
str = strings.TrimSpace(" tn a long gopher ntrn ") fmt.Printf("str=%v\n", str)
17.将字符串左右两边指定的字符去掉:strings.Trim("!hello world!", "!") // strings.TrimLeft // strings.TrimRight
str = strings.Trim("! he!llo!", " !") fmt.Printf("str=%q\n", str)
18.判断字符串是否以指定的字符串开头:strings.HasPrefix("ftp://192.168.10.1", "ftp")
b := strings.HasPrefix("ftp://192.168.10.1", "ftp") fmt.Printf("b=%v\n", b)
19.判断字符串是否以指定的字符串结束:strings.HasSuffix("NLT_abc.jpg", "abc")
b = strings.HasSuffix("NLT_abcd", "abc") fmt.Printf("b=%v\n",b)
标签:统计 itoa hello upper err tin jpg i++ equal
原文地址:https://www.cnblogs.com/xiangxiaolin/p/11795896.html