Go Standard Library Cookbook

How to do it...

1. Open the console and create the folder chapter06/recipe09.
2. Navigate to the directory.
3. Create the comparison.go file with the following content:

        package main        import (          "bufio"          "crypto/md5"          "fmt"          "io"          "os"        )        var data = []struct {          name string          cont string          perm os.FileMode        }{          {"test1.file", "Hello\nGolang is great", 0666},          {"test2.file", "Hello\nGolang is great", 0666},          {"test3.file", "Not matching\nGolang is great\nLast line",           0666},        }        func main() {          files := []*os.File{}          for _, fData := range data {            f, err := os.Create(fData.name)            if err != nil {              panic(err)            }            defer f.Close()            _, err = io.WriteString(f, fData.cont)            if err != nil {              panic(err)            }            files = append(files, f)          }          // Compare by checksum          checksums := []string{} for _, f := ...