RE: [xsl] Summation and NaN

["Michael Kay" <mhkay at iclway dot co dot uk>]

> When I use the following:
>
> <xsl:value-of
> select="format-number(sum(Borrower[Rank=1]/AssetSet/Asset/Amount),
> '$.00')"/>
>
> the page displays "NaN" when none of the "Amount" elements in
> the XML have values.

Actually it will display "NaN" when any one of the "Amount" elements has no
value.

Instead of NaN, I would like the page to display nothing (a blank)

Assign the result of sum() to a variable, then use <xsl:choose> to test
whether this variable is NaN. You can test for NaN by

<xsl:when test="string($total)='NaN'">

or (less readably) by

<xsl:when test="$total!=$total">

since NaN is the only value that isn't equal to itself.

Mike Kay
Software AG


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