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

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

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

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...

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!

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.

I've been trying to learn some zig

I learn about using graph theory to solve problems!

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

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

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 : '';