Re: [xsl] Re: max value

["Charly" <cohana@xxxxxxxxxxxxxxx>]

Thanks Dimitre.
I still have a problem with maximum.xsl. It doesn't like the ";" as
separator.
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";;
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
xmlns:maximum-pick-bigger="f:maximum-pick-bigger"
xmlns:maximum-own-compare="f:maximum-own-compare"
exclude-result-prefixes="xsl maximum-own-compare maximum-pick-bigger">

I get
500 Servlet Exception
maximum.xsl:2: expected `>' at `;'
I've tried to remove it and it gets worse.
I get
java.lang.RuntimeException: unknown function: msxsl:node-set

Is there something I can do about it .




<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";;
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
xmlns:maximum-pick-bigger="f:maximum-pick-bigger"
xmlns:maximum-own-compare="f:maximum-own-compare"
exclude-result-prefixes="xsl maximum-own-compare maximum-pick-bigger"
>


----- Original Message -----
From: "Dimitre Novatchev" <dnovatchev@xxxxxxxxx>
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Monday, December 10, 2001 9:47 PM
Subject: [xsl] Re: max value


> > Hello,
> > Is there a way to get the max value .
> >
> > something that would look like and returns "11"
> >
> > <xsl:template match="values">
> >       <xsl:value-of select="max(value)" />
> > </xsl:template>
> >
> > <values>
> >    <value>7</value>
> >    <value>11</value>
> >    <value>8</value>
> >    <value>4</value>
> > </values>
>
> You don't have to wait for a specific vendor to implement some new
"features" of
> Exslt, nor have you to wait for XSLT 2.0.
>
> Just grab and use this immediately ***now***:
>
> http://sources.redhat.com/ml/xsl-list/2001-11/msg00407.html
>
>
> This is a functional-programming style implementation of max(), where the
comparison
> function is passed to the standard max() template as a parameter.
>
> This (like  sumAndTransform) gives a general solution to all class of
max/min
> problems, in which the ordering relation may not be the most common "<"
and the
> elements may not be "just numbers".
>
> Using the standard max() function from the standard functional-programming
XSLT
> library, you'll simply need one minute (an experienced XSLT programmer may
need 15
> minutes to write and debug from scratch a new recursive template, a newbie
may not
> succeed to do this in a single day) to write the following:
>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
> xmlns:maximum-own-compare="maximum-own-compare"
> xmlns:Mycompare="Mycompare"
> exclude-result-prefixes="xsl Mycompare"
> >
>    <xsl:import href="maximum.xsl"/>
>
>    <xsl:output method="text"/>
>    <Mycompare:Mycompare/>
>
>     <xsl:template match="/">
>       <xsl:variable name="vCMPFun"
select="document('')/*/Mycompare:*[1]"/>
>
>       <xsl:call-template name="maximum">
>         <xsl:with-param name="pList" select="/*/*"/>
>         <xsl:with-param name="pCMPFun" select="$vCMPFun"/>
>
>       </xsl:call-template>
>     </xsl:template>
>
>     <xsl:template name="MyIsGreater" match="*[namespace-uri() =
'Mycompare']">
>          <xsl:param name="arg1"/>
>          <xsl:param name="arg2"/>
>
>          <xsl:choose>
>           <xsl:when test="$arg1 > $arg2">1</xsl:when>
>           <xsl:otherwise>0</xsl:otherwise>
>          </xsl:choose>
>     </xsl:template>
> </xsl:stylesheet>
>
> Or you can even omit the "MyIsGreater" template, because the standard
max() template
> has a default comarison, in case it is not specified by the caller:
>
> <xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>    <xsl:import href="maximum.xsl"/>
>    <xsl:output method="text"/>
>
>     <xsl:template match="/">
>       <xsl:call-template name="maximum">
>         <xsl:with-param name="pList" select="/*/*"/>
>
>       </xsl:call-template>
>     </xsl:template>
> </xsl:stylesheet>
>
> In both cases, when applied to the following (your) source xml:
>
> <values>
>    <value>7</value>
>    <value>11</value>
>    <value>8</value>
>    <value>4</value>
> </values>
>
> These two transformations return the same correct answer:
> 11.
>
> The max() function is so powerful, because it accepts a user-supplied
comparison
> function as a parameter -- that is, max() is a higher order function.
>
> This gives us countless possibilities for reuse. One example is to build
the min()
> function. To do this, we have just to change a single line in our
"MyIsGreater"
> template:
>
> replacing:
>
>           <xsl:when test="$arg1 > $arg2">1</xsl:when>
> with
>
>           <xsl:when test="$arg1 &lt; $arg2">1</xsl:when>
>
> in the "MyIsGreater" template above,
>
> will reverse the comparison and the result of the transformation will now
be:
>
> 4
>
> Or, you could easily make it find the maximum of hexadecimal numbers, or
numbers
> coded in some special way that makes them not standard XSLT numbers (but
NaN
> instead).
>
> As shown in
>
> http://sources.redhat.com/ml/xsl-list/2001-11/msg00407.html
>
> this powerful function is based on an even more powerful and generic
function
> "foldl", which is a generic higher-order function that applies any
> parameter-function (operation) on the elements of a list and accumulates
the effect
> of these applications.
>
> In this way we get multitude of useful functions -- sum, product, map,
append,
> reverse, sum-of-products, ... etc., ... etc.
>
> Any non-functional-based standard library will need many years and
numerous releases
> in order to provide just a specific subset of these functions and will
still be
> incomplete -- at a cost of an effort that could be prohibitively large
when compared
> to a library of higher-order functions.
>
> I have produced the XSLT 1.0 implementations of some of the most important
> list-processing functions from the Haskell Prelude, plus other functions.
>
> I'd be glad to make these freely available soon.
>
> Cheers,
> Dimitre Novatchev.
>
>
>
>
>
>
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