Go

Read a file with Go

package main

import (
  "bufio"
  "fmt"
  "log"
  "os"
)

func main() {
  f, err := os.Open("inputfile")
  if err != nil {
    log.Fatal(err)
  }
  defer f.Close()

  scanner := bufio.NewScanner(f)
  for scanner.Scan() {
    fmt.Println(scanner.Text())
  }
  if err := scanner.Err(); err != nil {
    log.Fatal(err)
  }
}

You could also:

• Use ioutil.ReadFile to read the whole file into memory.
• Use a buffer with bufio.NewReader to read the file line by line.

Programming