Re: Modified allwords() function
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- Subject: Re: Modified allwords() function
- From: Mike Pall <mikelu-0505@...>
- Date: 2005年5月14日 22:57:57 +0200
Hi,
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 modify
> 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
Bye,
Mike