Golang : Read a text file and replace certain words



Tags : golang read replace

Problem : You have a text file with some words that you need to replace with another word. Solution : Use the bytes.Replace() function. For example : package main import ( "bytes" "fmt" "io/ioutil" "os" ) func main() { input, err := ioutil.ReadFile("original.txt") if err != nil { fmt.Println(err) os.Exit(1) output := bytes.Replace(input, []byte("replaceme"), []byte("ok"), -1) if err = ioutil.WriteFile("modified.txt", output, 0666); err != nil { fmt.Println(err) os.Exit(1) original.txt this is a text file that contains couple of replaceme words that need to be replaced. for example, a replaceme word in this line and another [replaceme] word in this line too and after executing the above code modified.txt this is a text file that contains couple of ok words that need to be replaced. for example, a ok word in this line and another [ok] word in this line too

  See also : Golang : Read file



Tags : golang read replace

By Adam Ng

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