If you are not familiar with the PTSD method (Program to Speedily delete), then you can refer to this article of mine: The PTSD Method in Software Development, before following on with the article. If you are too lazy to read, here you go: The main idea is to think…

that’s a question Have you heard of Non-Blocking APIs, what it is and why we should consider using it? If you haven’t known yet, this is the post for you. Blocking vs Non-Blocking Back in previous century (20th century), every C developer should know this function. int getchar(); This function reads a character…

What is a Rate Limiter? — Rate Limiting is used to control the rate of action done in a system. It can be used to prevent DoS attack or web scraping. What is Mana? Magic or mana is an attribute assigned to characters within a role-playing or video game that indicates their power to use special magical abilities or…

Let’s say that you have M tasks, and you want to distribute to N servers. Here is the interface of the class we are going to build: We have a class called ConsistentMap and a get operation where we want to get an assigned server that we want to…

PTSD — “Program To Speedily Delete” is a programming methodology invented by me after working for several years at Visa, Amazon & Meta. The main idea of this method is before writing any code, think about how to delete it later. …

Moving to Singapore… — 4 years ago I decided to pack my bags and moved to Singapore after getting a job offer from Visa when my daughter was just 5 months old. Growing up in the country side of Vietnam, I had never thought in my life that I could once visit another country…