preface

This article mainly introduces the Golang implementation of string reverse order related content, Shared for your reference and learning, the following words are not enough, let’s start with a detailed introduction:

The string is inverted as follows:

Hello World — > dlroW olleH

Solution 1:

  length := len(str)
  array := make([]string , length)
  for i , v := range str{
   array[i] = string(v)
  }
  for i := 0 ; i < length/2 ; i++ {
   array[i], array[length -i - 1] = array[length - i -1 ], array[i]
  }
  str = ""
  for _ , v := range array {
   str += v
  }

The general idea is:

str - Loop - > array - Cycle - > Invert — cycle — > str

You can switch to Chinese.

Question:

It looks tedious, and using a 3-layer cycle is definitely not efficient.

Solution 2

 bytes := []rune(str)
 for from , to := 0 , len(bytes) -1 ; from < to ; from , to = from + 1, to -1{
  bytes[from] , bytes[to] = bytes[to] , bytes[from]
 }
 str = string(bytes)
 return str

Using a 1-layer loop, invert and convert []byte to string directly using the built-in string function of go

General idea:

string — Directly use the array building method, pass in str, get array — > []byte —for cycle — > Invert - the built-in string function > string

Question:

Cannot convert byte type

Solution 3:

 bytes := []rune(str)
 for from , to := 0 , len(bytes) -1 ; from < to ; from , to = from + 1, to -1{
  bytes[from] , bytes[to] = bytes[to] , bytes[from]
 }
 str = string(bytes)
 return str

Solution 2: Unable to convert Chinese characters:

conclusion

Reference:

string rune byte relationship