Golang(Go语言)代码技巧之字符串(string)

str := "hello roc"
bytes := []byte(str)
bytes[1] = 'a'
str = string(bytes) //str == "hallo roc"

substr := str[n:m] //截取从索引n到m-1的子串

//for遍历，此方式只能遍历存放ASCII
//编码的字符串，比如中文就不行
for i := 0; i < len(str); i++ {
	//... = str[i]
}
//for-range遍历，此方式可以遍历Unicode
//编码的字符串，不担心乱码
for index, char := range str {
	fmt.Printf("%d %c\n",index,char)
}

//字符串中字符全为ASCII中的字符
len(str)
//字符串中含非ASCII的Unicode字符
utf8.RuneCountInString(str)

var buf bytes.Buffer
buf.WriteString("hello ")
buf.WriteString("roc")
fmt.Println(buf.String()) //hello roc

str := strings.Join([]string{"hello"," world"},"")
fmt.Println(str)

str := "hello"
str += "roc"