Question

How to remove file extension in Go

Answer 1

package main

import (
	"fmt"
	"path/filepath"
	"strings"
)

/*
RemoveFileExtension removes the last file extension from a filename or path.

Examples:
  document.pdf      -> document
  archive.tar.gz    -> archive.tar
  photo.jpg         -> photo
  README            -> README
  /tmp/file.txt     -> /tmp/file

Parameters:
  path - The filename or path.

Returns:
  The filename/path without its last extension.
*/
func RemoveFileExtension(path string) string {
	// Get the last extension, including the leading dot.
	ext := filepath.Ext(path)

	// No extension found.
	if ext == "" {
		return path
	}

	// Remove the extension from the end of the path.
	return strings.TrimSuffix(path, ext)
}

func main() {
	fmt.Println(RemoveFileExtension("document.pdf"))
	fmt.Println(RemoveFileExtension("archive.tar.gz"))
	fmt.Println(RemoveFileExtension("/tmp/file.txt"))
	fmt.Println(RemoveFileExtension("README"))
}


/*
run:

document
archive.tar
/tmp/file
README

*/

 

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Answer 2

package main

import (
	"path/filepath"
    "fmt"
)

/*
RemoveFileExtension removes the last extension from a filename or path.
*/
func RemoveFileExtension(path string) string {
	ext := filepath.Ext(path)

	return path[:len(path)-len(ext)]
}

func main() {
	fmt.Println(RemoveFileExtension("document.pdf"))
	fmt.Println(RemoveFileExtension("archive.tar.gz"))
	fmt.Println(RemoveFileExtension("/tmp/file.txt"))
	fmt.Println(RemoveFileExtension("README"))
}


/*
run:

document
archive.tar
/tmp/file
README

*/

 

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