Subject: Re: [xsl] XPath expression which checks that a string is between 1 and 10 characters in length? From: "Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 26 Jul 2016 11:59:27 -0000 |
I forgot to mention, I need an XPath 2.0 solution. /Roger -----Original Message----- From: Martin Honnen martin.honnen@xxxxxx [mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx] Sent: Tuesday, July 26, 2016 7:55 AM To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: Re: [xsl] XPath expression which checks that a string is between 1 and 10 characters in length? On 26.07.2016 13:51, Costello, Roger L. costello@xxxxxxxxx wrote: > 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? Well, in XPath 3 you can use let $l := string-length() return ($l gt 0 and $l le 10)
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