JavaScript sparse array by example

JavaScript array is still an object

Linux shell redirection

Even though I googled and used this many time, I always forgot about all these: &2>1, 1>2&, 1>&2. So I hope that writing it down myself can help to remember their rule.

Mapping ports and sub-domains with NGINX reverse proxy

This is simple step by step guide to setup a Reverse Proxy using nginx in Linux. Installing step takes Ubuntu for example, but you can go to nginx page for other platform install guide.

Find list of top starred and forked in github

By searching in github

Top starred: https://github.com/search?q=stars:%3E1&s=stars&type=Repositories

Big O notation overview by example

This is great article of basic things about big O notation. Big O notation is used for describing the complexity of algorithm, or the cost of doing something in worst case. Just want to sum up here.