https://zobayer.net/My personal blog site. 2026-08-09T03:22:40+06:00 Zobayer Hasan https://zobayer.net/ Jekyll © 2026 Zobayer Hasan /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2026-07-19T03:00:00+06:00 2026-07-19T13:29:32+06:00 https://zobayer.net/posts/matrix-exponentiation/ Zobayer Hasan

The title sounds like a linear-algebra exercise, but this isn’t about computing a matrix’s power for its own sake. It’s a technique that turns matrix powers into a way to jump straight to the n’th term of a recurrence in logarithmic time. Very handy when n is enormous. Sometimes a problem has an easy recurrence (e.g. a dynamic programming problem), but constraints make DP hopeless. Take the n’...

2021-05-09T05:00:00+06:00 2026-08-01T22:03:41+06:00 https://zobayer.net/posts/python-flask-tutorial-day2/ Zobayer Hasan

Welcome back!!! In part 1 of this series, we built a small Flask application from scratch: packaging files, a create_app factory, an instance/ directory for environment-specific configuration, and a single health-check endpoint under myapi/endpoints/v1/, all covered by a tox-based test setup. We tagged that state as v0.1.0. Part 2 picks up exactly where part 1 ended. Here we will: Pin depe...

2021-05-08T05:00:00+06:00 2026-08-01T22:03:41+06:00 https://zobayer.net/posts/python-flask-tutorial-day1/ Zobayer Hasan

Flask is a popular micro-framework written in Python. It has a very small core and is very easy to extend. There are barely any restrictions or fixed structures in Flask, which also makes it very easy to mess things up. In this tutorial series, I will try to demonstrate how to build a Flask RESTful application from scratch. There are tools such as cookiecutter-flask-restful to quick-start a Fl...

2020-09-17T14:01:01+06:00 2026-08-09T03:21:46+06:00 https://zobayer.net/posts/design-better-urls/ Zobayer Hasan

If you are designing RESTful APIs, designing the URLs is always a challenge. In this post, I tried to summarize a few key points that might help you to design better URLs. URL Root Prefix Always specify a root prefix for your RESTful project. Whether it can be a generic word like api, rest, or service really depends on the domain. If the domain is already self-explanatory, for example, api.ta...

2020-07-31T23:01:01+06:00 2024-11-22T14:07:21+06:00 https://zobayer.net/posts/first-post/ zobayer

Hello World! After a long pause filled with the bustling demands of life, I’ve finally carved out a bit of free time. Why not dive back into writing? Sure, I might be my own solitary reader, but honing my technical writing skills still feels like a valuable endeavor. Dusting off the old platforms of Blogger and WordPress didn’t appeal to me this time. I was on the lookout for something stream...