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> Geo Massar wrote:
> > As per the book written by R. Ierusalimschy, allwords() function
> > generates words which contain only letters and numbers. I'd like to
> > the function so that words can be anything printable between spaces. The
> > mod is shown below, rather more complicated. Is there a way to simplify
> > the code?
> This is a perfect example for a coroutine iterator (see chapter 9.3):
> local function allmatches(pattern)
>   return coroutine.wrap(function()
>     for line in io.lines() do
>       for word in string.gfind(line, pattern) do
>         coroutine.yield(word)
>       end
>     end
>   end)
> end
> for i in allmatches("%S+") do
>   print(i)
> end

Thanks,  Mike

I am not used to coroutine concept yet. But, I'll save your code in my
personal archive.