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Re: XPath 1.0 Expression to Test for 3 Digit Number

Subject: Re: XPath 1.0 Expression to Test for 3 Digit Number
From: Vasu Chakkera <vasucv@xxxxxxxxx>
Date: Sun, 27 May 2012 09:14:56 +0100
Re:  XPath 1.0 Expression to Test for 3 Digit Number
string-length could be tricky if the number 999 is represented as 00999.

On 8 May 2012 21:14, G. Ken Holman <gkholman@xxxxxxxxxxxxxxxxxxxx> wrote:
> At 2012-05-08 13:07 -0700, Don Smith wrote:
>>
>> I need an XPath 1.0 expression that will test a node and return a
>> boolean if the node content is a 3 digit number (i.e., 100-999) and
>> false if it's anything else.
>>
>> The catch is this expression won't
>> be in a transformation so I can't use variables or other additional
>> constructs. All I get is one expression. I've tried this
>>
>> *[(string(number(.)) !='NaN')]
>>
>>
>> and
>>  obtained the number that I need. But I can't get any sort of compare to
>>  work that makes the number be more than 99 and less than 1,000.
>
>
> Did you try just checking its length?  Note I use a different comparison to
> ensure the value is, itself, a number at all.
>
> *[number(.)=number(.) and string-length(string(number(.)))=3]
>
> I hope this helps.
>
> . . . . . . . . Ken
>
>
> --
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>



--
Vasu Chakkera
NodeLogic Limited
Oxford
www.node-logic.com
==============

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