go read text file into string array

http://*.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")