Golang : Read a text file and replace certain words
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
By Adam Ng
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