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local function extract(text)
    return string.match(text, "^[%w%s_-]*%w")
end
 
print(extract("mar_paci (toto totot)"))
print(extract("toi-re/3.9"))

Success #stdin #stdout 0.01s 5488KB

stdin

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Standard input is empty

stdout

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mar_paci
toi-re

https://ideone.com/qzCZAE

language:

Lua (luac 5.3.3)

created:

visibility:

secret

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