创建多个可供读写的临时文件, 并保证最终可以关闭

CreateFiles.go

package main

import (
	"fmt"
	"os"
)

// Creat Many files to read or write
// file name likes `tmp-file_ok-0``
func FileCreator(fileCnt int) {
	// Now we create the files
	fileArr := make([]*os.File, fileCnt)
	var err error

	for i := 0; i < fileCnt; i++ {
		fileArr[i], err = os.OpenFile(fmt.Sprintf("tmp-%s-%d", "file_ok", i),
			os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
		if err != nil {
			panic(err)
		}

		// after a func end, the file should be closed
		defer fileArr[i].Close()
	}
}

// With this gist, you could create many files to write and
// use defer to close them.
func main() {
	FileCreator(3)
}