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Cover image for April 9th, 2021: What did you learn this week?

April 9th, 2021: What did you learn this week?

Nick Taylor (he/him)
Lead software engineer at Forem. Caught the live coding bug on Twitch at livecoding.ca
・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.

It’s time to get your learn on

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.👇👇🏻👇🏼👇🏽👇🏾👇🏿

Someone feeling like "Yaaas!"

Discussion (30)

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idrisrampurawala profile image
Idris Rampurawala • Edited

Recently, while working on one of my tasks to process a very large AWS S3 file, I came across this really good AWS S3 select feature. This helped me accomplish my task and decided to share my learnings with the community 😁

Hope the community finds it an interesting read 🙏

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Nick Taylor (he/him) Author

Yeah!

A T-Rex saying Yeah!

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Idris Rampurawala

@nickytonline thanks 😁 The king of gifs on dev.to 🤭

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Heiker • Edited

vim has an easy mode. You enable it by using -y flag, like this vim -y. Is kinda cool, it makes it behave like a regular "click-and-type" text editor. In this mode regular shortcuts work as expected, ctrl + s for save, ctrl + c for copy, ctrl + v paste, ctrl + z to undo, ctrl + y redo.

The downside (and the reason nobody makes a big deal about it) is that is was designed to be used inside a GUI, so no shortcut to quit. You need to close whatever graphical interface vim is in.

Not all is lost, I think it provides a nice base to use vim for quick edits. For the people who will never use vim on purpose, I will recommend creating a .vimrc on their home folder with this content.

" Enable 'easy mode'
source $VIMRUNTIME/evim.vim

"  Ctrl + q to Quit vim
inoremap <c-q> <c-o>:q<cr>
Enter fullscreen mode Exit fullscreen mode

This will create a ctrl + q shortcut to quit. You could also replace (or add) <Esc> as a shortcut to quit.

This way even if you enter vim by accident it will behave somewhat like a "normal" text editor.

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Nick Taylor (he/him) Author

Awesome!

Hackerman from Kung Fury putting on a Nintendo Power glove

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stephanieopala profile image
Stephanie Opala

I learned state management in React, useState to be specific.

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Pravin Poudel

Same here, It was interesting to learn that, and now the state is available on functional component too. I found it quite easy handling with a hook rather than in-state in-class component. I haven't done much but I hope I am not wrong.

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Stephanie Opala

Me too, so far I find it easier to use hooks rather than in-state in class components.

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Nick Taylor (he/him) Author

Pam from The Office saying Nice!

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Cassidy Scheffer (she/her)

I learned how to use GitHub's Scientist gem, and ran my first experiment on a weird trick for (sort of) speeding up ORDER BY.

dev.to/cassidycodes/one-weird-tric...

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Nick Taylor (he/him) Author

BB-8 giving a thumbs up

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leob profile image
leob • Edited

I learned something yesterday which for me was a pretty "weird" discovery:

If you use CSS Flex and you want to (for example) right-align one particular item (while leaving the rest "default"), then guess what you can use ... "margin-left: auto"!

Pretty surprising, to me at least. More info here:

dev.to/samanthaming/flexbox-aligni...

Well so that wasn't what I expected really, I was looking for something like "align-self" or "justify-self" or whatever ...

Speaking of which - I can never remember which is which ("align-items" or "justify-content"), and I finally came across a way to somewhat easily remember which is which:

css-tricks.com/a-quick-way-to-reme...

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Nick Taylor (he/him) Author

Captain America saluting

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Daniel Uber

I learned that ruby ships with a .gdbinit file in the source repo, that permits inspecting the class/objects in the internals, basically handling the unpacking of the tagged ids for you, and saving the results as history items.

Of course I learned that after searching a few locations for "how to debug ruby" and finding a mix of snippets, most attributing a blog that's been offline for a year or two as the source, and a lot of two paragraph "here's how to start gdb" tutorials.

Kind of handy to have the tooling to debug the vm ship with the language sources!

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Nick Taylor (he/him) Author

Jean-Luc Picard from Star Trek TNG saying Well done!

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Atul Prajapati
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Nick Taylor (he/him) Author

Nice!

A kangaroo playing an electric guitar

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Atul Prajapati

:)

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Jason F • Edited

I used the !! operator for the first time. I used it in a ternary and it looks something like this:

const myValue = !!thing.val ? thing.val : '';

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Nick Taylor (he/him) Author • Edited

Boolean magic!

Shia LeBoeuf in character saying "Magic!"

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voralagas profile image
Pravin Poudel

This week I learned about React Hook, more about reference and reference forwarding in React.

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Nick Taylor (he/him) Author

Nice!

Actor from Game of Thrones saying Nice!

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Matthew Daly

Today I started using Snowpack. I'm seeing really fast build times for React applications with it - even on a creaky old laptop adding a new Tailwind class is basically instantaneous.

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Nick Taylor (he/him) Author

A puppet Yeti clapping their hands saying congratulations

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Pranav Baburaj

I've been trying to learn some zig

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Nick Taylor (he/him) Author

Actor Zach Galifianakis giving a thumbs up in a convertible car

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Kirk Shillingford • Edited

I learn about using graph theory to solve problems!

dev.to/kirkcodes/solving-the-domin...

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Nick Taylor (he/him) Author

Charlie from It's Always Sunny in Philadelphia talking in front of a board with all kinds of strings and arrows depicting something very complicated

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g.sunilkumar

this week, i learnt 3 new courses :
1) Express REST API
2) Introduction into micro-services
3) mind mapping techniques for better learning.

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Nick Taylor (he/him) Author

Lego astronaut saying awesome!