Re: status of undo?

[Teika Kazura <teika lavabit com>]

On Sun, 17 Jan 2010 16:35:07 -0800, D M German wrote:

> something like: if this function is defined used it, but otherwise
> don't generate an error?

There're several ways.

1.
(when (load "foo" 'no-error)
  ;; non-nil means success
  body...)

2.
(let ((filename "foo.jl"))
  (when (file-exist-p filename)
    (load filename 
          nil ;; no-error
          nil ;; no-path
          'no-suffix ;; this is necessary, if you add ".jl[c]". 
                     ;; Current doc is wrong.
    )))

3.
(when (condition-case nil
        (require 'foo)
       (error nil))
  body...)

> Just wondering... what is the status of undo? 
Dunno.

Teika (Teika kazura)