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Re: Emacs Lisp Programming Questions


From: Andreas Röhler
Subject: Re: Emacs Lisp Programming Questions
Date: Wed, 04 Nov 2009 10:26:47 +0100
User-agent: Thunderbird 2.0.0.19 (X11/20081227)

David Combs wrote:
> In article <address@hidden>,
> Kevin Rodgers  <address@hidden> wrote:
>> clint.laskowski wrote:
>>> Hello, gnu.emacs.help. I have a few questions about programming in
>>> Emacs Lisp. I hope you can help. Here they are:
>>>
>>> 1. Is this a good place to ask questions about programming in Emacs
>>> Lisp, especially with regards to text processing? If there's a better
>>> place, I'd appreciate knowing.
>>>
>>> 2. I want to write an interactive Elisp program to remove sequential
>>> duplicate lines from a buffer. This buffer is not sorted, and it
>>> should not be sorted. The program should simply look for two
>>> sequential lines that are identical, delete one, and then move on to
>>> the next line and do it over until it reaches the end of the buffer.
>>>

just see I used a private `region-active-p'

(unless (featurep 'xemacs)
  (defun region-active-p ()
    "and mark-active transient-mark-mode
 (not (eq (region-beginning) (region-end)"
    (and mark-active transient-mark-mode
         (not (eq (condition-case nil (region-beginning)(error nil)) 
(condition-case nil (region-end) (error nil)))))))




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