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Cover image for June 26th, 2020: What did you learn this week?

June 26th, 2020: What did you learn this week?

nickytonline profile image Nick Taylor (he/him) ・1 min read

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.

PSA "Learn to use the Internet Level II

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.πŸ‘‡πŸ‘‡πŸ»πŸ‘‡πŸΌπŸ‘‡πŸ½πŸ‘‡πŸΎπŸ‘‡πŸΏ

Toddler making a fist as if to say "Yes!"

Discussion

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Editor guide
 

A lot of terminal stuff it seems.

I learned that instead of using > you can use >> to concat an output to a file.

For grep I learned a bunch of options like -v (ignore case), -A (lines after), -B (lines before), -o (get just the specific searched string) and this cool one -Eo '.{0,20}a href.{0,70}' to get the amount of chars before and after an occurrence of a string, 'a href' in that case.

Learned of a type of program called terminal notifier, which notifies you when a long task like compiling finally finishes. Though I couldn't figure out how to get that to work w/ my server I SSH into.

Learned about Insomnia, alternative to Postman.

This git command, git diff -U0 HEAD~1 , which will just show you the difference and no lines before like git diff usually does. Helpful for when I pipe for a change like git diff -U0 HEAD~1 | grep crm to see if I missed a search and replace.

Lastly how to find the top 5 directories , du -hs * | sort -rh | head -5. This helped me when my VM that I use for my staging Cassandra instance got full and nothing could connect anymore. I learned where Cassandra keeps the data on the disk, /var/lib/cassandra/data

 
 

Realised that DE-NO is NO-DE reversed. Changed my life.

 

Did you mean :p

"node".split("").sort().join("")
 
 

I learned about linters and started setting up ESLint for one of my repos.

 
 

Great week for me! I set up pre commit hooks for linting and running tests for staged files, set up a Jenkins pipeline, and got docker compose running for my services. I want to write my first post/guide on one of them later this week

 

Learned how to setup all AWS resources using templates and AWS Sam. It's easier (once you get the hang of it), it can be put in source control, it can be included in build scripts, it can be launched locally. Really happy with this. Wrote a post about it too: dev.to/psiho/build-deploy-all-aws-...

 

I learn how to add forms to an observable notebook (it's like a coding playground) and modify their behavior. I used them to make interactive examples in here: Using the Maybe type in js

This was last week but I'm still proud I figure out how to do it.

 
 

I finally learned how to use docker for local development. I always pushed this aside until I needed to use postresql which is a pain to setup locally on a linux environment. So I learned how to use

WSL + Docker + Docker compose

Local development has hit a whole new level for me

 
 

this week i learned how to block ip addresses in wordpress and implmented it on my site as well. It is an important security aspect which site owners sideline. Was required from security aspect on our blog .have also come up with a post here dev.to/celyn_davis/how-to-block-ip...

 
 

I made a visualisation of the clustering algo ${ baby-oopsy-daisy.github.io/sketche...
Give this a look, and the most important, you feedback
(Doesn't work in firefox mobile, if you know the reason please enlighten me)
✌️🧐

 
 

actions/cache@v2

GitHub actions cache. My gatsby site now builds in about half the time, much of which is now installing node_modules and deploy.

REGEX

I got comfortable enough with a few regex commands to use it to filter data catalogs.

 

GitHub actions cache be like

The Flash running

 

I learned how to use bookmarks and Mark All/find feature in Notepad++ to select lines that contains/not contains some string in a huge log file.
winhelponline.com/blog/remove-line...
Then, I remembered I could have used grep utility instead :-)

 

I learned about - that this simple js code
window.print();
you can print the screen πŸ”₯

 
 

I finish one article writing about React Testing and start to explore the Static Site Generator - Gatsby.js's concepts and starting guide.

 
 

As newbies in React js , i've learned React imposible states error handling , React REDUCERS HOOKS and use of Third party library

 
 

Learnt about Tree data structures. Diving into binary search trees. Will be publishing a devpost every Saturday.

 

That's awesome! πŸ”₯

Yes, that's awesome!

 

After long procrastination and constant notifications from Notion and TickTick, I finally started to learn TypeScript πŸ”₯
Any paths or suggestions for me to learn it are always welcomed πŸ™ŒπŸ»
TypeScript
P.S: Any other typescript memes are always welcomed πŸš€

 

I learned some more C#/XAML styling techniques 😁

 
 

This week i learnt about lighting in webgl and yesterday designed reaponsive navbar using flexbox.

 
 
 

Node.js, Express.js, MongoDb and the beauty of MVC architecture never felt so good and eventful in while now.

 

I learned how partial page updates work in Hey site. Pretty cool stuff, indeed!
dev.to/borama/a-few-sneak-peeks-in...

 
 

I've learned about how to setup a Packagist mirror for composer fans in my country :).

Check this blog post.

 
 

Using face-api.js ! I read the docs(I'd say they are great) and I made Try not to laugh challenge(under AI supervision)
tilakmaddy.github.io/Try-Not-To-La...

 
 

I re-learned that just because a library promises zero-configuration, it isn't necessarily so, and sometimes it's easier to roll your own.

 

They said zero config...

Large Jenga falling on a boy

 

Upgrading to Angular 10 from 9 (which was done just a week ago). Thinking Angular should be named as Zoomgular due to speed of releases.

 

Zoom zoom zoom!

1st place in Mariokart