Re: pattern matching problem

On Fri, Aug 30, 2013 at 5:10 PM, Geoff Smith <spammealot1@live.co.uk> wrote:

Hi

Wow, you guys are quick. Three working solutions and a debate about the subtleties of a solution, all in the time I would be chewing my pencil and staring at a blank sheet of paper

I tried all 3 solutions, they all work fine. I am still trying to digest how they all work though. Its a very useful example in learning how pattern matching works, it would be a good and practical example problem for the Lua wiki page.

Thanks to everyone for your help

Regards Geoff

Geoff,

I think that conceptually the simplest variation of the all the solution is the following

function trim0(numstr) return numstr:gsub('(%.%d%d-)0*$', '%1') end

trim0('120000000') ==> 120000000

trim0('12.000000') ==> 12.0

trim0('12.003400') ==> 12.0034

Hope it helps.

--Leo--