Subject: RE: [xsl] can a value of a parameter depends on a other value From: Roelof Wobben <rwobben@xxxxxxxxxxx> Date: Thu, 1 Dec 2011 18:00:42 +0000 |
Thanks, So both are good. One question. If I have two variables which depends on the same condition but will have other values do I have to write three seperate variable blocks ? Roelof ---------------------------------------- > Date: Thu, 1 Dec 2011 16:06:11 +0000 > From: davidc@xxxxxxxxx > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: Re: [xsl] can a value of a parameter depends on a other value > > On 01/12/2011 15:51, Roelof Wobben wrote: > > > > > > Hello, > > > > > > > > I did some investigation and found this script. > > > > > > > > > > <xsl:variable name="foo"> > > <xsl:choose> > > <xsl:when test="condition1"> > > ...value if condition1 is true > > </xsl:when> > > <xsl:otherwise> > > ...value if condition1 is not true > > </xsl:otherwise> > > </xsl:choose> > > </xsl:variable> > > > > <xsl:apply-templates select="/foo/bar"> > > <xsl:with-param name="foo" select="$foo"/> > > </xsl:apply-templates> > > > > > > > > > > Is this a good example of a condtional with-param ? > > > > well working is good;-) > as always, if you only use a variable once can (but don't have to) > inline the definition, so here the global variable $foo is only used > once so you could equivalently go > > <xsl:apply-templates select="/foo/bar"> > <xsl:with-param name="foo"> > <xsl:choose> > <xsl:when test="condition1"> > ...value if condition1 is true > </xsl:when> > <xsl:otherwise> > ...value if condition1 is not true > </xsl:otherwise> > </xsl:choose> > </xsl:with-param> > </xsl:apply-templates> > > > But it probably compiles to more or less the same thing. > One of the nice features of side-effect free languages is that the > compiler has a lot of freedom to re-arrange the code, if you use the > same subterm multiple times the compiler can reuse the value, > effectively implictly making a variable, conversely if you only use a > variable once it can inline the definition, effectively removing the > variable. > > So use of variables or not often just amounts to personal coding style > aesthetics. > > dDavid > > > > > > -- > google plus: https:/profiles.google.com/d.p.carlisle > > ________________________________________________________________________ > The Numerical Algorithms Group Ltd is a company registered in England > and Wales with company number 1249803. The registered office is: > Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. > > This e-mail has been scanned for all viruses by Star. The service is > powered by MessageLabs. > ________________________________________________________________________
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