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Re: How to write specify default values for function arguments?
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From: |
Tony |
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Subject: |
Re: How to write specify default values for function arguments? |
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Date: |
Tue, 1 Oct 2002 16:06:36 -0400 |
"gnuist006" <gnuist006@hotmail.com> wrote in message
b00bb831.0210011045.5f29a1b4@posting.google.com">news:b00bb831.0210011045.5f29a1b4@posting.google.com...
> I am looking for multiple ways for
> specifying default values for function arguments
> as you can do in C++.
>
> thanks
use &optional, any parameters left out will be nil.
(defun foo (required-arg &optional opt1 opt2)
(unless opt1 (setq opt1 default-val-1))
(unless opt2 (setq opt2 default-val-2))
...)
-Tony