Re: regex for roman numerals

[Wolfgang Laun]

Where is the Python regular expression to do what this Python code does?

Nobody thinks that *converting *a roman number to an integer is possible
using nothing but a regular expression, no matter the language.

-W

On Tue, 7 Mar 2023 at 18:02, Peng Yu <pengyu.ut@gmail.com> wrote:

> That is what I thought. My guess is that awk regex is not powerful
> enough to capture roman numerals.
>
> https://www.tutorialspoint.com/roman-to-integer-in-python
>
> Here is a python program that recognizes roman numerals. I don't see
> how regex in awk can have the ability to capture this logic.
>
> On 3/7/23, Wolfgang Laun <wolfgang.laun@gmail.com> wrote:
> > Just for a puzzle: I claim that the requirement to determine whether a
> > string contains exactly one roman numeral (according to the rules for
> > ancient numerals or for medieval rules - take your pick) cannot be met in
> > awk with one single regular expression and no additional code.
> > But it can be done in some other regex implementations, e.g. Perl, Java,
> > Python.
> >
> > Cheers
> > -W
> >
> >
> > On Tue, 7 Mar 2023 at 09:11, Manuel Collado <mcollado2011@gmail.com>
> wrote:
> >
> >> El 6/3/23 a las 21:45, Peng Yu escribió:
> >> > Hi,
> >> >
> >> > I see there are some discussion online about regex for roman numerals.
> >> > But I don't find a discussion specific for awk. What is the regex for
> >> > roman numerals in awk?
> >> >
> >>
> >> The same as in any other application that use regexes.
> >>
> >> --
> >> Manuel Collado - http://mcollado.z15.es
> >>
> >>
> >
> > --
> > Wolfgang Laun
> >
>
>
> --
> Regards,
> Peng
>


-- 
Wolfgang Laun