How to optimize aggregate queries in Clickhouse?

We will talk about a way which allow us to make keep aggregated data.
Read more →

How To Trace Your System Calls On Mac OS

dtruss is analog of strace in linux. It allows you to trace system calls from a running process or run a process with tracing. Also we are take a look on an alternative way.
Read more →

Python Cheat Sheet

Cheat sheet for quick solving your cases on HackerRank
Read more →