Thank you! 
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I’m currently on page # 65. After writing visitors and visitors_admin, when I save a visitor, it isn’t displayed on the homepage.
I can see the visitors Dets file (without an extension) in the root of the project.
When I run visitors_db:dumb_visitors(). in the console it shows saved visitors.
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It worked! 
After reading the code again, I noticed that the index.erl's body() is displaying visitors for today, while I was saving visitors in other dates.
I can spare a little time every day, and I’m slower too in Erlang, but as they say, “Slow and steady wins the race”. Hope I don’t lose enthusiasm!
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