How to Convert and Sort Dates in XSL : Small Tip..
Sometimes small things comes pretty handy. Like this one;
Scenario : Pick the biggest date from the list of dates.
Solution:
- Converting a Date from one format to another
- Sort them in ascending order.
- Pick the first Date from the list ( thats the one you looking for
)
Assume your input XML is something like this (Date format is YYYYMMDDTHH:MM:SS)
<DateList>
<Date>20040931T18:31:04</Date> <Date>20040831T18:31:04</Date> <Date>20040715T18:31:04</Date> <Date>20041223T18:31:04</Date>
</DateList>
XSL file
<?xml version=”1.0″ encoding=”UTF-8″?>
<xsl:stylesheet version=”1.0″ xmlns:xsl=”http://www.w3.org/1999/XSL/Transform;
<xsl:template match=”/”>
<xsl:for-each select=”DateList/Date”>
<xsl:sort order=”ascending” select=”translate(.,’T::’, ‘,’)”/>
<xsl:if test=”position() = last()”>
<xsl:value-of select=”.”/>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
This will print output as
20041223T18:31:04
This is biggest date. you can also print the date in a different format.
- translate() : does the same job as search and replace
- “.,’T::’, ‘,’ ” : “.” means Date node value, “T: : ‘,’ ” means search for T and : and replace with ‘ ‘ (blank space)
- position() = last()” : means if current index == last index (position(): returns current index)
Happy XSLTingggg!!..
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