Ask HN: Advice on selecting domain name for my programming blog/website?

I am a software developer and would like to create a blog/website about mean stack JavaScript application, nodejs frameworks tutorials etc.

Inspired by websites

simpleprogrammer.com cleverprogrammer.com

So would like to build something like that but in my own niche

But Already Spent two day just brainstorming and came up with few domains which are available but not sure which one to choose feeling stuck :(

Here is my list

1. 101node.com/io

2. 101null.com/io

3. 101promise.com/io

4. instaprogrammer.com

5. activeprogrammer.com

6. Meanprogrammer.com

7. meanify.io

Thanks in advance