my custom emacs file

.emacs

(setq line-number-mode t
      column-number-mode t
      linum-format "%\ 3d ")
(global-linum-mode t)
(setq display-time-format " %A %e %B %Y, %H:%M "
      display-time-24hr-format t)
(display-time)
(setq-default show-trailing-whitespace t)
(global-font-lock-mode t)
(show-paren-mode t)
(require 'mouse)
(xterm-mouse-mode t)
(defun track-mouse (e))
(setq mouse-sel-mode t)
(setq ido-enable-flex-matching t)
(setq ido-everywhere t)
(ido-mode 1)
(setq mac-option-modifier 'super)
(setq mac-command-modifier 'meta)
(defun iwb ()
  "indent whole buffer"
  (interactive)
  (delete-trailing-whitespace)
  (indent-region (point-min) (point-max) nil)
  (untabify (point-min) (point-max)))
(when (>= emacs-major-version 24)
  (require 'package)
  (package-initialize)
  (add-to-list 'package-archives '("melpa" . "http://melpa.milkbox.net/packages/") t)
  )