Re: XPath expression which checks that a string is be

Not true for the empty string

Sent from my iPhone

> On Jul 26, 2016, at 5:01 AM, Wolfgang Laun wolfgang.laun@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Just for fun:
>
> string-length() idiv 2 le 5
>
> Optimization by obfuscation. Phooey.
> -W
>
>> On 26 July 2016 at 13:55, Martin Honnen martin.honnen@xxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>> 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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