Emacs中在指定区域（region)中删除重复行的函数

将以下代码加入到.emacs文件中

(defun uniq-lines (beg end)
  "Unique lines in region.
Called from a program, there are two arguments:
BEG and END (region to sort)."
  (interactive "r")
  (save-excursion
    (save-restriction
      (narrow-to-region beg end)
      (goto-char (point-min))
      (while (not (eobp))
        (kill-line 1)
        (yank)
        (let ((next-line (point)))
          (while
              (re-search-forward
               (format "^%s" (regexp-quote (car kill-ring))) nil t)
            (replace-match "" nil nil))
          (goto-char next-line))))))

然后在编辑区域中设定region. 并通过

M-x uniq-lines

执行函数。