Re: [xsl] choose/when question

[Jeni Tennison <mail at jenitennison dot com>]

Hi Jo,

> the result of the two when statements are identical, it is only the
> otherwise that has different behaviour. I am wondering if it would
> have any noticible effect on performance to combine the two when
> statements into one? and if it would how would i do this? is like
> this:

It probably wouldn't have any noticeable effect on performance, but it
would make your stylesheet more maintainable. You can combine the two
conditions with an 'or', as follows:

  <xsl:choose>
    <xsl:when test="@number = 'one' or @number = 'two'">
      ...
    </xsl:when>
    <xsl:otherwise>
      ...
    </xsl:otherwise>
  </xsl:choose>

There's no simple way of checking whether the value of @number is in a
list in the way that you tried, although you could hold them in some
XML and test against that, or you could do something like:

  contains(':one:two:', concat(':', @number, ':'))

The separate tests are probably clearer unless you have a large number
of possible values.

I hope that helps,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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