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While touring United States, I ended up in Tennessee. There isn’t a lot to do in Tennessee, especially, during the winters that I visited. So, here are a few small ideas for a day trip. I would recommend starting the day with Rednor Lake State Park Check out The Parthenon. It is a full-scale replica of The Parthenon in Athens, Greece. I would recommend combining your trip with a visit to the city of Birmingham in Alabama and the city of Louisville located in Kentucky. ...

Javascript isn’t a language. It is just a specification. Well, that’s true for many other languages like Python and Java. However, most languages have just one de facto implementation. For example, CPython for Python. Java has two major ones - Oracle’s JDK and Google’s Android Java. That’s not true for Javascript though.

Alabama is a flyover state with historic connections to the civil rights movement of the United States. I spent a day in Birmingham, Alabama and here’s what I would recommend visiting. Start your day with Birmingham Civil Right Institute which talks about the race relations and the civil rights movements for the Black citizens. I would recommend spending an hour or two here. From here, visit Sloss Furances, a historic landmark around industrialization of the United States. ...

There are two major ways to make money on consumer Internet - subscription or ads. Also, unlike enterprise-world, usage-based subscription is hard and confusing for consumers. So, we end up with 10$ a month all-you-can-consume buffet or we end up with ads. Now, like it or not, not all users are created equal. Some are more valuable than others. And these valuable users indirectly pay more than the users with less spending power. In other words, these users subsidize the product for the less fortunate fellows. In fact, in some ways, ads are a transfer of wealth from rich to poor users of the same service. So, next time wonder when people complain about ads, they will always be rich and powerful. These rich users would prefer a minuscule 10-a-month price instead of being worth thousands, if not millions, for the advertisers. And if the product has network effects, like social media, then it is unavoidable for these richer folks. ...

I crawled through the 2 by 2 feet hole. I checked the map again. If the map is right then in about 30 ft, this passage should open into a big enough chamber for me to walk out of this aptly named Labyrinth cave. My elbows were bruised. So were my knees. And then a small stalactite scratched my forehead. That’s when time stopped for me. I decided to lie down. 100s of small thorny stones were pinching me. I was calm. I looked around. A video feed of this would have been claustrophobic for the viewers but I felt nothing. At least not till my forehead got scratched.

Why does Punjab produce so many singers? Even from the nearby Haryana, New Delhi, or Uttar Pradesh, the best singers usually sing in Punjabi. So, why are so many good singers Punjabi speaking? Well, there is an answer. A perfect pitch is the ability to discern sounds that are close (within 6%) in frequencies. Having a more perfect pitch makes you better at singing. Learning a tonal language makes you better at perfect pitch. And Punjabi is the only tonal language of India! ...

Mt. Fuji is a tough but gorgeous hike. It is much shorter than Grand Canyon or Mt. Whitney and can be done on a day trip.

Bengaluru-based Postman, a API management product, has raised a total of $433 million valuing it at ~$5.6B. Its revenue was $171M in 2023. As a comparison, Rubrik with ~$850M ARR is valued at $6B or about 7 times its revenue. The same metric would put Postman’s valuation at $1.2B. I would argue further that Postman has much lower stickiness and will face higher churn and hence, the revenue multiple would be lower for Postman. ...

This is a story of a messaging app used by billions of users. The app followed an extremely strong model of privacy. The app never persisted the user’s data on the servers. All the communication is end-to-end encrypted. A lot of users of this app, especially, on Android would regularly uninstall and reinstall the app. Now, to prevent these users from losing messages, the messages were backed up to the user’s SD card. In the Android security model, an SD card is a public storage space, accessible to all apps. So, to keep messages private, the backups were encrypted. ...

One up on Wall Street by Peter Lynch is an impressive book about fundamental analysis for stock picking. Following is my terse summary of the same. Emphasis on Fundamental Analysis Look around for companies that are performing well and invest in them before Wall Street institutional investors pick them In the long run, common stocks give the best rate of returns Only basic math is needed to analyze and pick stocks “Don’t gamble, invest your savings to buy good stocks and hold them till they go up and then sell them. If it doesn’t go up, don’t buy it” Investing directly in common stocks is a seven-card stud-poker hand Rules of investing in the market Buy a home (≠ house) before stocks Only invest what you can afford to lose (without impacting your daily life) Patience, Common sense, and willingness to do independent research Ignore short-term fluctuations There is nothing called a good or bad market Predictions are futile ...