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lualua-patterns

Find any special characters in a string

I still struggle big time to match a string that contains the special characters (punctuation, underlines, etc). How can I make it work with patterns?

if string.match(mystr, '???') ~= nil then
  print('Invalid characters.')
end
Solution

  • Character sets [...] are your friend here.

    .*[@!#$%^&*()?<>].*