October 8th, 2021: What did you learn this week?

I learned that you can use a regular expression that specifies the g flag with exec()to perform iterative matching in JavaScript :

>> const regex = /./g
>> const s = "What is happening?"
>> regex.exec(s)
Array [ "W" ]
>> regex.exec(s)
Array [ "h" ]
>> regex.exec(s)
Array [ "a" ]
>> regex.exec(s)
Array [ "t" ]
...
>> regex.exec(s)
null
>> regex.exec(s)
Array [ "W" ]

​

I learned about concurrent vs parallel programming, what that means.
Wrote a small post with some demos about it nickymeuleman.netlify.app/garden/c...

a longer post about applying that in Rust is coming 👀

I learned you can add pretty specific comments about the source of SQL queries in a rails app by adding the marginalia gem to your project.

This makes it easier to tie specific queries or updates to the location in the code that called them:

  Profile Create (0.6ms)  INSERT INTO "profiles" ("created_at", "updated_at", "user_id") VALUES ($1, $2, $3) RETURNING "id" /*line:/app/models/user.rb:20:in `block (3 levels) in <class:User>'*/  [["created_at", "2021-10-13 16:56:31.006007"], ["updated_at", "2021-10-13 16:56:31.006007"], ["user_id", 218762]]

Now, I can that this profile creation was triggered by code on line 20 in the User class definition...

I learned more about UX design and its history because I had to write an article about it for freeCodeCamp News.

How to use TravisCI? I learned this in class. I also learned Lit a bit.

I leaned Dango channel and websockets

Learned about Livewire Computed Properties! Now i can finally reuse all my queries in the same lifecycle without having to rerender them again and again!
🤓🤓😎