[英]How to check if a buffer is empty?
How to check if a buffer is empty? 如何检查缓冲区是否为空? Checking if
count-lines
gives 0 is over-killing for this I think. 我认为检查
count-lines
为0是过度杀戮。
UPDATE: Yeah, phils's answer should work. 更新:是的,菲尔斯的答案应该有效。 Write it out:
把它写出来:
(defun buffer-empty-p (&optional buffer)
(= (buffer-size buffer) 0))
buffer-size is a built-in function in `C source code'.
(buffer-size &optional BUFFER)
Return the number of characters in the current buffer.
If BUFFER, return the number of characters in that buffer instead.
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