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RomanPushkin
on April 22, 2019
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Ask HN: What is your money-making side project out...
I made $6000 in 2018 selling my Ruby book online. It was in my native language, but I'm translating it into English. About half of the book has been translated.
50% off if you're interested
http://leanpub.com/rubyisforfun/c/IQrM7FYyuepX
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50% off if you're interested http://leanpub.com/rubyisforfun/c/IQrM7FYyuepX