Seems OK as an introduction, however:
1. The function map() is traditionally defined in almost all FP
languages to take as first argument a function that operates on a
*single item* of the sequence -- not on all items.
Therefore, either do not use the name "map" -- to avoid the confusion
with the esatblished meaning of map(), or re-define it:
<xsl:function name="f:map" as="item()*">
<xsl:param name="pFun" as="element()"/>
<xsl:param name="pList1" as="item()*"/>
<xsl:sequence select=
"for $this in $pList1 return
f:apply($pFun, $this)"
/>
</xsl:function>
2. It is useful to define the function f:apply() --witha at least the
one-argument overload version:
<xsl:function name="f:apply">
<xsl:param name="pFunc" as="element()"/>
<xsl:param name="arg1"/>
<xsl:apply-templates select="$pFunc" mode="f:FXSL">
<xsl:with-param name="arg1" select="$arg1"/>
</xsl:apply-templates>
</xsl:function>
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
On Sat, Sep 25, 2010 at 11:37 AM, Costello, Roger L.
<costello(_at_)mitre(_dot_)org> wrote:
Hi Folks,
I wrote a short article that shows, step by step, how to create XSLT
functions that manipulate functions (i.e., how to create higher-order
functions):
Introduction
A powerful programming technique is to create functions that can accept
functions as arguments or return functions as values. Functions that
manipulate functions are called higher-order functions. This article shows
how to implement higher-order functions using XSLT 2.0.
More ...
http://www.xfront.com/higher-order-functions-in-XSLT/How-to-Create-XSLT-Functions-that-Manipulate-Functions.pdf
/Roger
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