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Luffy

[DUVIDA] Como eu verifico se um valor já existe em um aquivo txt pelo io.open

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Pessoal, eu gostaria de saber se tem alguma forma de verificar se um determinado valor já existe dentro de um txt através do io.open?

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ou

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Muito obrigado, Tierri!

E se eu quisesse obter um valor que ta dentro do aquivo txt, o que eu teria de fazer?

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Eu já encontrei outra solução pro meu problema. Muito Obrigado, Tierri.

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