(defun unittest-d-file (args)
  (interactive "sEnter args:")
  (setq fname (buffer-file-name))
  (setq cmdStr (concat "time rdmd -unittest --main \""   fname "\" " args))
  (setq buffname (format "*%s*" cmdStr))
  (save-excursion
    (message (concat "Running:" cmdStr))
    (if (not (eq nil (get-buffer buffname))) (kill-buffer buffname))
    (setq compilation-scroll-output t)
    (compile cmdStr)
    (set-buffer "*compilation*")
    (rename-buffer buffname t)
    ))

(defun run-current-file-args (args)
  (let (extention-alist fname suffix progName cmdStr)
    (setq extention-alist ; a keyed list of file suffix to comand-line program to run
          '(
            ("php" . "php")
            ("pl" . "perl")
            ("py" . "python")
            ("rb" . "ruby")
            ("rspec" . "rspec")
            ("js" . "js")
            ("sh" . "bash")
            ("bash" . "bash")
            ("ml" . "ocaml")
            ("vbs" . "cscript")
            ("java" . "javac")
            ("go" . "rungo.sh")
            ("d" . "rdmd")
            ("html" . "firefox")
            )
          )
    (setq fname (buffer-file-name))
    (setq suffix (file-name-extension fname))
    (setq progName (cdr (assoc suffix extention-alist)))
    (setq cmdStr (concat "time " progName " \""   fname "\" " args))
    (setq buffname (format "*%s*" cmdStr))

    (if (string-equal suffix "el")
        (load-file fname)
      (if progName                    ; is not nil
          (save-excursion
            (message (concat "Running:" cmdStr))
            (if (not (eq nil (get-buffer buffname))) (kill-buffer buffname))
            (setq compilation-scroll-output t)
            (compile cmdStr)
            (set-buffer "*compilation*")
            (rename-buffer buffname t)
        (message "No recognized program file suffix for this file.")
        )))))

(defun run-current-file ()
  "Execute or compile the current file.
For example, if the current buffer is the file x.pl,
then it'll call “perl x.pl” in a shell.
The file can be php, perl, python, ruby, javascript, bash, ocaml, java.
File suffix is used to determine what program to run."
  (interactive)
  (run-current-file-args ""))

(defun run-current-file-prompt (args)
  (interactive "sEnter args:")
  (run-current-file-args args))

(global-set-key "\C-c@"         'run-current-file-prompt)
(global-set-key "\C-c#"         'unittest-d-file)