go介绍32——字符串操作

package mainimport ("fmt""regexp"
)func main() {buf :&＃61; &＃96;

">


package mainimport ("fmt""strconv"
)func main() {//1. 字符串追加//转换位字符串后追加到字节数组slice :&＃61; make([]byte, 0, 1024)slice &＃61; strconv.AppendBool(slice, true)//第二个数为要追加的数&＃xff0c;第三个数指定十进制方式追加slice &＃61; strconv.AppendInt(slice, 1234, 10)slice &＃61; strconv.AppendQuote(slice, "go")fmt.Println("slice &＃61; ", string(slice))//bool转换为字符串var str stringstr &＃61; strconv.FormatBool(false)//float转换为字符串str &＃61; strconv.FormatFloat(3.1415, &＃39;f&＃39;, -1, 64)//整型转字符串str &＃61; strconv.Itoa(1234)fmt.Println("str &＃61; ", str)//字符串转其他类型flag, err :&＃61; strconv.ParseBool("true")if err &＃61;&＃61; nil {fmt.Println("flag &＃61; ", flag)} else {fmt.Println("err &＃61; ", err)}//字符串转换为整型a, err :&＃61; strconv.Atoi("123")if err &＃61;&＃61; nil {fmt.Println("a &＃61; ", a)} else {fmt.Println("err &＃61; ", err)}
}

正则表达式1

package mainimport ("fmt""regexp"
)func main() {buf :&＃61; "abc azc a2c qwe 888 ip9 bn5"//1.解析规则:会解析正则表达式 如果成功返回解析器//reg :&＃61; regexp.MustCompile(&＃96;a.c&＃96;) //a开头 中间任意字符 c结尾//reg :&＃61; regexp.MustCompile(&＃96;a[0-9]c&＃96;)reg :&＃61; regexp.MustCompile(&＃96;a\dc&＃96;)if reg &＃61;&＃61; nil {fmt.Println("reg &＃61; ", reg)return}//2.根绝规则提取关键信息s :&＃61; reg.FindAllStringSubmatch(buf, -1) //-1表示匹配所有fmt.Println("s &＃61; ", s)
}

正则表达式2

package mainimport ("fmt""regexp"
)func main() {buf :&＃61; "2.13 12.12 2 1.2 5.6 12 acb"//1. 解析正则表达式reg :&＃61; regexp.MustCompile(&＃96;\d&＃43;\.\d&＃43;&＃96;) //&＃43;表示前一个字符1次或多次if reg &＃61;&＃61; nil {fmt.Println("reg &＃61; ", reg)return}//2. 提取关键信息s :&＃61; reg.FindAllStringSubmatch(buf, -1) //-1表示匹配所有fmt.Println("s &＃61; ", s)
}

正则表达式3

package mainimport ("fmt""regexp"
)func main() {buf :&＃61; &＃96;

">