go read text file into string array

http://stackoverflow.com/questions/5884154/golang-read-text-file-into-string-array-and-write

方法一

package main

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

// readLines reads a whole file into memory
// and returns a slice of its lines.
func readLines(path string) ([]string, error) {
  file, err := os.Open(path)
  if err != nil {
    return nil, err
  }
  defer file.Close()

  var lines []string
  scanner := bufio.NewScanner(file)
  for scanner.Scan() {
    lines = append(lines, scanner.Text())
  }
  return lines, scanner.Err()
}

// writeLines writes the lines to the given file.
func writeLines(lines []string, path string) error {
  file, err := os.Create(path)
  if err != nil {
    return err
  }
  defer file.Close()

  w := bufio.NewWriter(file)
  for _, line := range lines {
    fmt.Fprintln(w, line)
  }

}

方法二（比较简洁，但文件不能太大）

content, err := ioutil.ReadFile(filename)
if err != nil {
    //Do something
}
lines := strings.Split(string(content), "\n")