Friday Blast #3

Horia Coman Originally published at horia141.com on ・2 min read

A shorter blast this week, on account of being on vacation.

A brief history of the UUID (2017) - what I expected to be a short article about UUIDs turned into a deep dive into their long history. There’s even some code archeology involved. Fun fact: telephone numbers were the first unique identifiers we used in communication.

The best icon is a text label (2015) - and the best summary is the title itself.

Implementing state machines in PostgreSQL (2017) - worth it alone for the advanced usage of Postgres, this article talks about various ways of implementing state machines directly in Postgres. More than just having a state column and letting application code deal with state management, that is.

Boolean logic in polynomials (2017) - a neat way to encode boolean formulas as polynomials. You transform a boolean expression A with variables x_1, x_2, \dots, x_n into a polynomial A_P in x_1, x_2, \dots, x_n by turning every AND into multiplication and every negation of a term F into 1 - F_P. OR is handled by DeMorgan’s law. There’s two or three examples in the article of real-life[1] applications of this transformation as well.

[1] Real-life CS theory at least.

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Horia Coman

Leading the Bolt teams in Bucharest. We're working on cool products like food delivery, and interesting and challenging platforms like geo, A/B testing, user accounts and route tracking.