string of Golang (go Language) code tricks (String)

This is a creation in Article, where the information may have evolved or changed.

• Change some characters in a string

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

• Intercept sub-strings

substr := str[n:m] //截取从索引n到m-1的子串

• Traversing strings

//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 forI:= 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)}

• Calculating string Lengths
  

//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)

• Connection string
  

    The quickest notation:

var buf bytes.Bufferbuf.WriteString("hello ")buf   writestring   (  "Roc"  )  fmt.Println(buf.String()) //hello roc

There are two different ways:

str  :=   strings   join   ([]  string  {  "Hello"    "World"  },   ""   fmt.Println(str)

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