Golang按日期和时间查找最新文件

Question

I am not sure if I am doing this correctly, but ultimately I would like to find the most recent modified date of a file in a directory and return the file name. The code I have so far is as follows. Can someone please help me with a more efficient solution than this. I really have a feeling this is super hacky. What I am doing is getting the dates and removing the

package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "strconv"
    "strings"
)

func main() {
    dir := "C:\\temp\\"
    files, _ := ioutil.ReadDir(dir)
    for _, f := range files {
        fi, _ := os.Stat(dir + f.Name())
        s := strings.Split(fi.ModTime().Format("2006-01-02 15.04.05.000"), " ")

        fdate, err := strconv.Atoi(strings.Replace(s[0], "-", "", -1))
        if err != nil {
            fmt.Println(err)
        }

        ftime, err := strconv.Atoi(strings.Replace(s[1], ".", "", -1))
        if err != nil {
            fmt.Println(err)
        }
        fmt.Println(fi.Name(), fdate+ftime)
    }

}

Answer 1

Pay attention to details and efficiency. Check for errors. You asked for files so skip directories and other things. Allow for multiple files with the same modified time stamp (for example, Windows file times have a resolution of, at best, 100-nanoseconds). You already have ModTime() so don't call os.Stat(). Use time.Time methods directly. And so on.

For example,

package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "time"
)

func main() {
    dir := `C:\temp\` // Windows directory
    files, err := ioutil.ReadDir(dir)
    if err != nil {
        fmt.Fprintln(os.Stderr, err)
        os.Exit(1)
    }
    var modTime time.Time
    var names []string
    for _, fi := range files {
        if fi.Mode().IsRegular() {
            if !fi.ModTime().Before(modTime) {
                if fi.ModTime().After(modTime) {
                    modTime = fi.ModTime()
                    names = names[:0]
                }
                names = append(names, fi.Name())
            }
        }
    }
    if len(names) > 0 {
        fmt.Println(modTime, names)
    }
}