m.karthikeyan Dev

Go Program to find File extension in a folder

A simple Go program to find file extension in the current folder. I have used flags, path/filepath and OS packages to get desired output.

 package main  
 import (  
      "flag"  
      "fmt"  
      "os"  
      "path/filepath"  
 )  
 func walkpath(path string, f os.FileInfo, err error) error {  
      if filepath.Ext(path) == ".go" {  
           fmt.Printf("%s", path)  
      }  
      fmt.Printf(" File Extension is %s n", filepath.Ext(path))  
      return nil  
 }  
 func main() {  
      flag.Parse()  
      root := flag.Arg(0) // 1st argument is the directory location  
      filepath.Walk(root, walkpath)  
 }

Output

 GoSublime r14.12.06-1 9o: type `help` for help and command documentation  
 [ `go run readdirwalk.go ./` | done: 766.5595ms ]  
      File Extension is   
       File Extension is .md   
      concurrency.go File Extension is .go   
      email-go.go File Extension is .go   
      email.go File Extension is .go   
       File Extension is .txt   
      imdb.go File Extension is .go   
      readdirwalk.go File Extension is .go   
      reverse-test.go File Extension is .go   
      seed.go File Extension is .go  
 [ ~/ownCloud/Documents/scripts/Go/src/github.com/mkarthikworld/karthikworld/ ] #