Re: [xsl] XPath expression which checks that a string is between 1 and 1

What is the purpose of making “efficient” source code?

I don’t think it is a good idea to assume that some kind of source code 
“efficiency” will result in execution or other efficiency.

I did a really trivial test and found no execution time difference between using

            
<result><xsl:value-of select="count(data/w[boolean(string-length(.)[. > 0 and . 
&lt; 11])])"/></result>

and

<result><xsl:value-of select="count(data/w[string-length(.) > 0 and 
string-length(.) &lt; 10])"/></result>


The “inefficient” code here

[string-length(.) > 0 and string-length(.) &lt; 10]


has the property that it is completely obvious what it is testing...


Dan





On 7/26/16, 7:51 AM, "Costello, Roger L. costello(_at_)mitre(_dot_)org" 
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:

> Hi Folks,
>
> I need an XPath expression which returns true if the string in <A> is between 
> 1 and 10 characters in length, and false otherwise.
>
> For example, the XPath expression should return true on this XML:
>
>       <A>hi</A>
>
> Here's an inefficient XPath expression:
>
> (string-length(.) gt 0) and (string-length(.) le 10)
>
> It's inefficient because it computes the string length twice.
>
> Is there a more efficient XPath expression to solve this problem?
>
> /Roger
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