[xquery-talk] Roman numeral kata in XQuery
Matthias Brantner
matthias.brantner at 28msec.com
Mon May 16 10:37:08 PDT 2011
Mattio,
some XQuery processors (e.g. Zorba) already implement the latest working draft of
XQuery 3.0 (see http://www.w3.org/TR/xquery-30/). This provides two interesting
features related to your example.
1. A switch expression (http://www.w3.org/TR/xquery-30/#id-switch)
switch ($input)
case "I" return 1
case "V" return 5
case "X" return 10
case "L" return 50
case "C" return 100
case "D" return 500
case "M" return 1000
default return 0
2. The XQuery 3.0 function library (see http://www.w3.org/TR/xpath-functions-30/#func-format-integer)
provides a function for the reverse conversion (i.e. integer to roman numeral). For example,
format-integer(55, 'I').
Best regards
Matthias
On May 11, 2011, at 5:51 PM, Mattio Valentino wrote:
> Hello,
>
> I hope this isn't too odd of a request.
>
> I wanted a little XQuery practice so I decided to try to port some
> code katas. I did the Roman numeral one first.
>
> Would anyone mind reviewing the solution I have here?
> http://bitbucket.org/mattio/xquery-katas/src/5ffd02da6f83/src/roman-numerals.xq
>
> There's no point practicing if I'm just going to reinforce bad habits! ;-)
>
> Thanks,
> Mattio
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