DEV Community

October 2nd, 2020: What did you learn this week?

Nick Taylor on October 02, 2020

It's that time of the week again. So wonderful devs, what did you learn this week? It could be programming tips, career advice etc. ![Deadpool a...

Read full post

Sundeep • Oct 2 '20

$ # This string 'has single' "and double" quotes and a $
$ !:q
'# This string '\''has single'\'' "and double" quotes and a $'
bash: # This string 'has single' "and double" quotes and a $: command not found

Saw this bash trick discussion at: news.ycombinator.com/item?id=24659282 which has other suggestions like:

!:q:p prevents the complaint about command not found
!:q and then pressing M-^ (probably Alt-Shift-6) to do the history expansion is probably more useful; then you can immediately edit the line.
bashquote() { printf '%q\n' "$(cat)" ; }

Nick Taylor • Oct 2 '20

That's awesome! 🔥

Phippsy • Oct 3 '20

I learned cannon.js which is a 3D physics engine for javascript.

Hot tip: cannon.js isn't actively maintained. Search for and use cannon-es.js which is an active maintained fork.

Also learned about quaternions used for rotation, and csg.js used for union, subtract and intersect operations on meshes.

Nick Taylor • Oct 3 '20 • Edited

Phippsy • Oct 3 '20

Your GIFs make my week. Thanks for doing this for everyone.

Nick Taylor • Oct 3 '20

André • Oct 2 '20

I started looking into using partitions in PostgreSQL 12 to improve executing slow queries on large tables. Also that the PostgreSQL project has really excellent documentation, props to them 👏 postgresql.org/docs/12/ddl-partiti...

I also learned how to approximate the number of rows in a large (> 100m rows) table without using COUNT(*): dev.to/andreligne/counting-large-t...

Nick Taylor • Oct 2 '20

Meghan (she/her) • Oct 2 '20

I finally learned how to write a Kubernetes Deployment .yml file! The particular one I wrote was a DaemonSet that deploys github.com/prometheus/node_exporter to every node in a cluster.

Unfortunately I wasn't able to test it because I still have to figure out getting a cluster going on my local machine, but that's a learn for another week 😅

But I'm relatively the syntax was right and I came up with this gist.github.com/nektro/27754c11a90...

Nick Taylor • Oct 2 '20

Awesome!

shadowtime2000 • Oct 3 '20

This week was a pretty unproductive week. I don't think I actually learnt anything except for the fact that it is better to open an issue with a feature instead of just discreetly adding the feature in a commit. Keeps it organized and allows other people to contribute.

Nick Taylor • Oct 3 '20

BOX PIPER • Oct 3 '20

I wrote a post on Circuit Breaker Pattern and It’s States, Build better software dev.to/boxpiperapp/circuit-breaker....
Unfortunately less traction from Dev.to community.
Would love to hear feedback’s

Nick Taylor • Oct 3 '20

Yordi Verkroost • Oct 3 '20

I learnt about Obsidian, second brains and how the two of them together are potentially very interesting!

dev.to/yordiverkroost/personal-kno...

Nick Taylor • Oct 3 '20

Yeah!

Andrea Disperati • Oct 3 '20

Learned a lot this week:
1- how to deploy on Heroku and set env variables
2- how to install and configure eslint and run it with a npm script
3- how to install and run CLoudinary on the frontend and upload images on Cloudinary from the backend (though I haven't learned all the code by heart because there is a lot of it)