Nick Taylor

Posted on Oct 2, 2020

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

#weeklylearn #discuss #weeklyretro

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 and his cohorts chatting](https://media.giphy.com/media/w7fJO4TOqiaSQ/giphy-downsized-large.gif)

Feel free to comment with what you learnt and/or reference your TIL post to give it some more exposure.

#todayilearned

Summarize a concept that is new to you.

And remember, if something you learnt was a big win for you, then you know where to drop it as well.👇👇🏻👇🏼👇🏽👇🏾👇🏿

Gracie Gregory (she/her) for The DEV Team

Oct 2 '20

What was your win this week?

#discuss #weeklyretro

1 min read

![Big win. Danny Devito walking away from a huge explosion](https://media.giphy.com/media/U6pavBhRsbNbPzrwWg/giphy-downsized-large.gif)

Top comments (27)

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! 🔥

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!

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

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

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)