通用正则表达式代码 [英] universal regex code
问题描述
我是网络开发的初学者，尤其是正则表达式代码，想知道是否有可能编写一个通用代码来检索站点的坐标，而不管它们是在 iframe 代码或图像 URL 中还是在
<script src="http://maps.google.com/maps?file=api&v=2&key=key" type="text/javascript"></script><script type="text/javascript">//<![CDATA[var html = '';无功纬度 = 44.799439;var lang = 20.483494;如果 (GBrowserIsCompatible()){...
第二个例子:
<iframe frameborder="0" border="0" scrolling="no" marginwidth="0" marginheight="0" title=""src="http://www.kolektiva.rs/beograd/dailydeal/vendor/map/center/44.79848,20.473856/"></iframe>是否可以先删除所有字符和所有仅是小数点坐标的字符，然后再取?
第一个例子:
评估以下 XPath 1.0 表达式:
normalize-space(translate(.,translate(.,' 0123456789.', ''), ' '))生产:
44.799439 20.483494这可以通过任何 XPath 引擎完成，并且上下文节点必须是文档节点，或者在 XSLT 1.0 中，如下:
<xsl:output omit-xml-declaration="yes" indent="yes"/><xsl:strip-space elements="*"/><xsl:template match="/"><xsl:value-of select=标准化空间(翻译(.，翻译(.，'0123456789.'，'')，''))"/></xsl:模板></xsl:stylesheet> 应用于此 XML 文档时(与提供的文档相同，但已完成):
<div id="g_map"></div><script src="http://maps.google.com/maps?file=api&v=2&key=key" type="text/javascript"></script><script type="text/javascript">//<![CDATA[var html = '';无功纬度 = 44.799439;var lang = 20.483494;如果 (GBrowserIsCompatible()){}]]></html>结果是:
44.799439 20.483494第二个例子:
<xsl:output method="text"/><xsl:template match="/"><xsl:for-each select="///*/@src"><xsl:value-of select=标准化空间(翻译(.，翻译(.，'0123456789.'，'')，''))"/></xsl:for-each></xsl:模板></xsl:stylesheet> 生产:
..44.7984820.473856需要多一点清洁.
<小时>二.更严重的处理(XPath 2.0/XSLT 2.0)
这种转换确实是通用的"并且适用于两个示例:
<xsl:output omit-xml-declaration="yes" indent="yes"/><xsl:strip-space elements="*"/><xsl:template match="/"><xsl:analyze-string select="string-join((.,///*/@*), ' ')"正则表达式="\-?\d+\.\d+"><xsl:匹配子串><xsl:sequence select="concat(., ' ')"/></xsl:matching-substring></xsl:analyze-string></xsl:模板></xsl:stylesheet> 应用于第二个 XML 时:
<iframe frameborder="0" border="0" scrolling="no" marginwidth="0"marginheight="0" 标题=""src="http://www.kolektiva.rs/beograd/dailydeal/vendor/map/center/44.79848,20.473856/"></iframe>产生想要的、正确的结果:
44.79848 20.473856
当应用于第一个示例的 XML 时，它也会产生想要的结果:
44.799439 20.483494
I am a beginner in web development especially in the regex code and want to know if it is possible to write a universal code that will retrieve the coordinates of the sites regardless of whether they are in the iframe code or image URL or in javascript.
<div id="g_map"></div>
<script src="http://maps.google.com/maps?file=api&v=2&key=key" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var html = '';
var lat = 44.799439;
var lang = 20.483494;
if (GBrowserIsCompatible())
{
...
second example:
<div class="map">
<iframe frameborder="0" border="0" scrolling="no" marginwidth="0" marginheight="0" title=""
src="http://www.kolektiva.rs/beograd/dailydeal/vendor/map/center/44.79848,20.473856/"></iframe>
</div>
Is it possible to first remove all the characters and all characters that were only the coordinates of the decimal point and so they take?
解决方案 First example:
Evaluating the following XPath 1.0 expression:
normalize-space(translate(.,translate(.,' 0123456789.', ''), ' '))
produces:
44.799439 20.483494
This can be done with any XPath engine and the context node must be the document-node, or within XSLT 1.0, as below:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/">
<xsl:value-of select=
"normalize-space(translate(.,translate(.,' 0123456789.', ''), ' '))
"/>
</xsl:template>
</xsl:stylesheet>
When applied on this XML document (the same as the provided one, but completed):
<html>
<div id="g_map"></div>
<script src="http://maps.google.com/maps?file=api&v=2&key=key" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var html = '';
var lat = 44.799439;
var lang = 20.483494;
if (GBrowserIsCompatible())
{}
]]>
</script>
</html>
the result is:
44.799439 20.483494
Second example:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:for-each select="//*/@src">
<xsl:value-of select=
"normalize-space(translate(.,translate(.,' 0123456789.', ''), ' '))
"/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
produces:
..44.7984820.473856
and needs just a little bit more cleaning.
II. More serious processing (XPath 2.0 / XSLT 2.0)
This transformation is really "universal" and works on both examples:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/">
<xsl:analyze-string select="string-join((.,//*/@*), ' ')"
regex="\-?\d+\.\d+">
<xsl:matching-substring>
<xsl:sequence select="concat(., ' ')"/>
</xsl:matching-substring>
</xsl:analyze-string>
</xsl:template>
</xsl:stylesheet>
When applied on the second XML:
<div class="map">
<iframe frameborder="0" border="0" scrolling="no" marginwidth="0"
marginheight="0" title=""
src="http://www.kolektiva.rs/beograd/dailydeal/vendor/map/center/44.79848,20.473856/">
</iframe>
the wanted, correct result is produced:
44.79848 20.473856
when applied on the XML for the first example, it also produces the wanted result:
44.799439 20.483494
这篇关于通用正则表达式代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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