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- Subject: Re: pattern matching problem
- From: Choonster TheMage <choonster.2010@...>
- Date: Sat, 31 Aug 2013 06:29:15 +1000
On 31 August 2013 06:14, Geoff Smith <email@example.com> wrote:
> I always seem to have difficulty with pattern matching in Lua, here is
> another example that has stumped me so far
> I am trying to trim a number string to remove non significant trailing
> zeros. So for example
> "123.450000000" = "123.45"
> "1234500" = "1234500"
> "12345.00" = "12345.0"
> I could of course write a function that iterates through the string from the
> back dropping zeros, but I thought there is probably a more elegant solution
> using Lua pattern matching functions.
> Can this be done neatly with pattern matching ? Thanks for any suggested
> code snippets
> Regards Geoff
Try this pattern:
local stripped = fullNumber:match("^(%d*%.?0?%d-)0*$")
Where fullNumber is the string containing the number that you want to
remove trailing zeroes from.