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Re: Yet more confusion over strings and objects in Lisp.

From: Norman Walsh <ndw at nwalsh dot com>
To: Gre7g Luterman <gre7g at wolfhome dot com>
Cc: DocBook-APPS <docbook-apps at lists dot oasis-open dot org>
Date: Thu, 11 Jul 2002 08:52:26 -0400
Subject: DOCBOOK-APPS: Re: Yet more confusion over strings and objects in Lisp.
References: <3D16E145.19500.23078CF2@localhost><3D16FEA7.12640.237A5472@localhost>

/ Gre7g Luterman <gre7g@wolfhome.com> was heard to say:
| (if (string=? (nav-context elemnode) "")
|
| part.  (nav-context elemnode) returns an object, not a string.  So 

If you're trying to test whether or not nav-context generates text, use

  (if (nav-context?)
     ...

(nav-context ...) returns a sosofo and those are by definition opaque.

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com>      | The sudden disappointment of hope
http://www.oasis-open.org/docbook/ | leaves a scar which the ultimate
Chair, DocBook Technical Committee | fulfillment of that hope never
                                   | entirely removes.--Thomas Hardy

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