.emacs.d/functions.el

(defun copy-whole-line ()
  (interactive)
  (save-excursion
    (kill-new
     (buffer-substring
      (point-at-bol)
      (point-at-eol)))))
(global-set-key (kbd "C-c w l") 'copy-whole-line)

(defun kill-all-buffers ()
  (interactive)
  (mapc 'kill-buffer (buffer-list)))
(global-set-key (kbd "C-c k k") 'kill-all-buffers)

(defun split-and-follow-horizontally ()
  (interactive)
  (split-window-below)
  (balance-windows)
  (other-window 1))
(global-set-key (kbd "C-x 2") 'split-and-follow-horizontally)

(defun split-and-follow-vertically ()
  (interactive)
  (split-window-right)
  (balance-windows)
  (other-window 1))
(global-set-key (kbd "C-x 3") 'split-and-follow-vertically)

(defun switch-to-previous-buffer ()
  (interactive)
  (switch-to-buffer (other-buffer (current-buffer) 1)))
(global-set-key (kbd "C-x b") 'switch-to-previous-buffer)
(global-set-key (kbd "C-c b") 'switch-to-buffer)

;; compilation
(setq compile-command "make ")
(global-set-key (kbd "C-x C-m") 'compile)

(defun mark-line ()
  (interactive)
  (move-beginning-of-line nil)
  (set-mark (point))
  (move-end-of-line nil))

(global-set-key (kbd "C-x C-z") 'mark-line)
(global-unset-key (kbd "C-z")) ; disable suspend frame
(global-unset-key (kbd "C-x C-z")) ; disable suspend frame
(global-set-key (kbd "C-x C-x") 'other-window)
(global-set-key (kbd "C-x C-b") '(lambda () (interactive)
                                   (bs-show nil)
                                   (swiper)))

(defun toggle-indent ()
  (interactive)
  (setq-default indent-tabs-mode (not indent-tabs-mode)))

(global-set-key [f5] (lambda ()
                       (interactive)
                       (disable-theme 'basic)
                       (load-theme 'magik)))
(global-set-key [f6] (lambda ()
                       (interactive)
                       (disable-theme 'magik)
                       (load-theme 'basic)))