| -- $Id: regexmatch.lua,v 1.2 2004-06-12 16:19:44 bfulgham Exp $ |
| -- http://shootout.alioth.debian.org |
| -- contributed by Roberto Ierusalimschy |
| |
| local text = io.read("*a") |
| |
| -- make sure text does not start with a number |
| text = "\n" .. text |
| |
| -- pattern is: not a digit, optional (, 3 digits, optional ), |
| -- space, 3 digits, space or hyphen, 4 digits, not a digit |
| local pattern = "%D(%(?)(%d%d%d)(%)?) (%d%d%d)[- ](%d%d%d%d)%f[%D]" |
| |
| local N = tonumber((arg and arg[1])) or 1 |
| local count = 0 |
| for i=N,1,-1 do |
| for open,area,close,exch,digits in string.gmatch(text, pattern) do |
| if (open == '(') == (close == ')') then |
| local tel = "("..area..") "..exch.."-"..digits |
| if i == 1 then |
| count = count+1 |
| io.write(count, ": ", tel, "\n") |
| end |
| end |
| end |
| end |
| |
| |
