写入文件

可以使用 WITH-OPEN-FILE 宏打开文件作为流写入。

(with-open-file (file #P"test.file" :direction :output
                                    :if-exists :append
                                    :if-does-not-exist :create)
  (dolist (line '("Foobar" "Barfoo" "Quuxbar"
                  "Barquux" "Quuxfoo" "Fooquux"))
    (write-line line file)))

同样可以使用 OPEN 和 CLOSE 手动完成。

(let ((file (open #P"test.file" :direction :output
                                :if-exists :append
                                :if-does-not-exist :create)))
  (dolist (line '("Foobar" "Barfoo" "Quuxbar"
                  "Barquux" "Quuxfoo" "Fooquux"))
    (write-line line file))
  (close file))