Unless your <p>-paragraphs aren't very long you should not use pattern
matching like this because this is a pattern that exhibits quadratic
performance depending on the string length.
I ran a quick test comparing Java's regex engine to the substring
comparison proposed here earlier on.
The "hit" case (2 x "the quick brown..."):
pattern: 0.000003061s - substr: 0.000000134s, a factor of 22
The "fail" case ("the quick brown..." vs "okkokoko...", equal lengths)
pattern: 0.000004452s - substr: 0.000000026s, a factor of 171
Some XSLT regex engine might be better, but its execution time is
still bound to increase by O(n^2).
-W
On 2 December 2011 17:29, Imsieke, Gerrit, le-tex
<gerrit(_dot_)imsieke(_at_)le-tex(_dot_)de> wrote:
<xsl:template match="p">
<xsl:copy>
<xsl:copy-of select="@*" />
<!-- use replace() for normalizing the input first, i.e., replace the
newline with a space: -->
<xsl:analyze-string select="replace(., '\s+', ' ')"
regex="^(.+)\s+\1$">
<!-- \1 is a back-reference to the first match, which is allowed according
to http://www.w3.org/TR/xpath-functions/#regex-syntax -->
<xsl:matching-substring>
<xsl:value-of select="regex-group(1)"/>
</xsl:matching-substring>
<xsl:non-matching-substring>
<!-- output the whole string if above regex doesn't match: -->
<xsl:value-of select="."/>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:copy>
</xsl:template>
On 2011-12-02 16:32, Jacob L wrote:
All,
I am using<xsl:stylesheet version="2.0" .If in the input XML file,
the text in the<p> tag repeats itself such as
<text>
<p>Bradley Cooper named People’s ‘Sexiest man alive 2011” Bradley
Cooper named People’s ‘Sexiest man alive 2011”</p>
</text>
I want to write code to check it and omit it. The result should be:-
After putting check in the xsl and deleting the duplicate string. The
output should be:-
<text>
<p>Bradley Cooper named People’s ‘Sexiest man alive 2011”</p>
</text>
Thanks for the help!
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le-tex publishing services GmbH
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Phone +49 341 355356 110, Fax +49 341 355356 510
gerrit(_dot_)imsieke(_at_)le-tex(_dot_)de, http://www.le-tex.de
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