myfunctions.el

(defun rb-strkeytosym (start end)
  "ruby Hash key string to symbol"
  (interactive "r")
  (replace-regexp "\"\\([a-z_]+\\)\"=>" "\\1: " nil start end))

(defun rb-htmlopttoerb (start end)
  "html attreibute to erb option"
  (interactive "r")
  (replace-regexp " \\([a-z_]+\\)=" ", \\1: " nil start end))

(defun strip-unused-html-attributes (start end)
  "remove unused html attributes"
  (interactive "r")
  (replace-regexp "\\(value\\|style\\|type\\): \"[^\"]*\",?" "" nil start end))

(defun rb-inputtoerb (start end)
  "input tag to erb"
  (interactive "r")
  (funcall (lambda ()
             (replace-regexp
              "<input\\([^>]+\\) ?name=\"\\([0-9a-z_]+\\)\"\\([^>]+\\)>"
              "<%= f.text_field :\\2\\1\\3 %>" nil start end)
             (call-interactively 'rb-htmlopttoerb)
             (call-interactively 'strip-unused-html-attributes))))