Autoenable linum-mode in emacs

linum-activation-snippet.el

;; Don't turn on linum-mode by default, it crashes org-mode. Ok to
;; turn it on for various modes, however.
(require 'linum)
(global-set-key "\C-c l" 'linum-mode)

(defun enable-linum-mode ()
  (linum-mode t))

; ----------------------------------------------------------------------
; Automatically enable linum mode for various modes
(setq modes-to-hook-with-linum '(c-mode-hook
                                 csv-mode-hook
                                 emacs-lisp-mode-hook
                                 coffee-mode-hook
                                 feature-mode-hook
                                 java-mode-hook
                                 js-mode-hook
                                 javascript-mode-hook
                                 espresso-mode-hook
                                 haml-mode-hook
                                 lisp-mode-hook
                                 nxml-mode-hook
                                 php-mode-hook
                                 ruby-mode-hook
                                 sass-mode-hook
                                 scss-mode-hook
                                 sh-mode-hook
                                 text-mode-hook
                                 textile-mode-hook
                                 xml-mode-hook
                                 yaml-mode-hook))

(defun hook-linum-mode (mode)
  (add-hook mode 'enable-linum-mode))

(while modes-to-hook-with-linum
  (hook-linum-mode (car modes-to-hook-with-linum))
  (setq modes-to-hook-with-linum (cdr modes-to-hook-with-linum)))