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    <title>CAD开发者社区 - S函数</title>
    <link>https://www.cadn.net.cn/portal.php?mod=list&amp;catid=878</link>
    <description>Latest 20 articles of S函数</description>
    <copyright>Copyright(C) CAD开发者社区</copyright>
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    <lastBuildDate>Thu, 25 Jun 2026 04:54:05 +0000</lastBuildDate>
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    <item>
      <title>showhtmlmodalwindow（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7888</link>
      <description><![CDATA[显示具有指定 URI（统一资源标识符）的模式对话框]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:18:59 +0000</pubDate>
    </item>
    <item>
      <title>setq（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7889</link>
      <description><![CDATA[将一个或多个符号的值设置为关联的表达式]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:17:19 +0000</pubDate>
    </item>
    <item>
      <title>sin（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7890</link>
      <description><![CDATA[返回角度的正弦值，作为以弧度表示的实数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:15:39 +0000</pubDate>
    </item>
    <item>
      <title>snvalid（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7891</link>
      <description><![CDATA[检查符号表名称中是否有有效字符]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:13:59 +0000</pubDate>
    </item>
    <item>
      <title>sqrt（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7892</link>
      <description><![CDATA[返回数字的平方根作为实数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:12:19 +0000</pubDate>
    </item>
    <item>
      <title>ssadd（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7893</link>
      <description><![CDATA[将对象（实体）添加到选择集，或创建新的选择集]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:10:39 +0000</pubDate>
    </item>
    <item>
      <title>ssdel（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7894</link>
      <description><![CDATA[从选择集中删除对象（实体）]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:08:59 +0000</pubDate>
    </item>
    <item>
      <title>ssget（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7895</link>
      <description><![CDATA[从选定对象创建选择集]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:07:19 +0000</pubDate>
    </item>
    <item>
      <title>ssgetfirst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7896</link>
      <description><![CDATA[确定选择和抓取哪些对象]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:05:39 +0000</pubDate>
    </item>
    <item>
      <title>sslength（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7897</link>
      <description><![CDATA[返回一个整数，其中包含选择集中的对象（实体）数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:03:59 +0000</pubDate>
    </item>
    <item>
      <title>ssmemb（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7898</link>
      <description><![CDATA[测试对象（实体）是否为选择集的成员]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:02:19 +0000</pubDate>
    </item>
    <item>
      <title>ssname（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7899</link>
      <description><![CDATA[返回选择集的索引元素的对象（实体）名称]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 10:00:39 +0000</pubDate>
    </item>
    <item>
      <title>ssnamex（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7900</link>
      <description><![CDATA[检索有关如何创建选择集的信息。]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:58:59 +0000</pubDate>
    </item>
    <item>
      <title>sssetfirst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7901</link>
      <description><![CDATA[设置选择和抓取的对象]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:57:19 +0000</pubDate>
    </item>
    <item>
      <title>startapp（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7902</link>
      <description><![CDATA[启动外部应用程序]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:55:39 +0000</pubDate>
    </item>
    <item>
      <title>strcase（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7903</link>
      <description><![CDATA[返回一个字符串，其中所有字母字符都已转换为大写或小写]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:53:59 +0000</pubDate>
    </item>
    <item>
      <title>strcat（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7904</link>
      <description><![CDATA[返回一个字符串，该字符串是多个字符串的串联]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:52:19 +0000</pubDate>
    </item>
    <item>
      <title>strlen（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7905</link>
      <description><![CDATA[返回一个整数，该整数是字符串中的字符数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:50:39 +0000</pubDate>
    </item>
    <item>
      <title>subst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7906</link>
      <description><![CDATA[在列表中搜索旧项，并返回列表的副本，其中替换了旧项的每次出现项]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:48:59 +0000</pubDate>
    </item>
    <item>
      <title>substr（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=7907</link>
      <description><![CDATA[返回字符串的子字符串]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Thu, 05 Jan 2023 09:47:19 +0000</pubDate>
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