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Re: help create function alias
From: |
Barry Margolin |
Subject: |
Re: help create function alias |
Date: |
Wed, 08 Dec 2010 15:29:08 -0000 |
User-agent: |
MT-NewsWatcher/3.5.3b3 (Intel Mac OS X) |
In article <i78deq$ue5$1@lust.ihug.co.nz>, Adam <nospam@example.com>
wrote:
> Pascal J. Bourguignon wrote:
>
> > Adam <nospam@example.com> writes:
> >
> >>> Marc Mientki wrote:
> >> [ ... ]
> >>
> >> Here's the (insert-date) function. Which I now find doesn't
> >> work when called from the changed (id) example below.
> >>
> >> M-x id returns "Wrong type argument: stringp, nil"
> >> Strange, as I never used M-x insert-date with any prefix-argument.
> >> Indeed am not sure how I'd do that (to use its options).
> >>
> >> (defun insert-date (prefix)
> >> "Insert the current date. With prefix-argument, use ISO format. With
> >> two prefix arguments, write out the day and month name."
> >> (interactive "P")
> >> (let ((format (cond
> >> ((not prefix) "%A, %d %B %Y")
> >> ((equal prefix '(4)) "%Y-%m-%d")
> >> ((equal prefix '(16)) "%A, %d. %B %Y")))
> >> (system-time-locale "de_DE"))
> >> (insert (format-time-string format))))
> >
> > (defalias 'id 'insert-date)
> >
> > M-x id RET --> Monday, 20 September 2010
> > C-y M-x id RET --> 2010-09-20
>
> Thanks. I saw alias somewhere recently, but couldn't
> er.. didn't find it in a search looking for it simply
> by name.
>
> Out of interest, how does one use the (insert-date) function
> above with a prefix ?
>
> e.g. C-u 4 M-x insert-date returns an error, and
> evaluating (insert-date 4) is not right.
See the Emacs Lisp Reference Manual section on prefix arguments. If you
enter a number explicitly, the prefix argument is just the number. But
if you do C-u M-x insert-date or C-u C-u M-x insert-date, it puts the
default argument in a list, which is what the function expects.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
- help create function alias, Adam, 2010/12/09
- Re: help create function alias, Marc Mientki, 2010/12/08
- Re: help create function alias, Adam, 2010/12/09
- Re: help create function alias, Adam, 2010/12/09
- Re: help create function alias, Pascal J. Bourguignon, 2010/12/08
- Re: help create function alias, Adam, 2010/12/09
- Re: help create function alias, Andreas Politz, 2010/12/08
- Re: help create function alias, Adam, 2010/12/09
- Re: help create function alias,
Barry Margolin <=
- Re: help create function alias, Pascal J. Bourguignon, 2010/12/08
Re: help create function alias, Stefan Monnier, 2010/12/08