Nick Taylor

Posted on Feb 25, 2022

February 25th, 2022: 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.

![Image of the brain](https://media.giphy.com/media/ojmB7lOn3VUU8/giphy.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.👇👇🏻👇🏼👇🏽👇🏾👇🏿

What was your win this week?

Gracie Gregory (she/her) for The DEV Team ・ Feb 25 '22

#discuss #weeklyretro

![Little kid making a fist as if to say "Yes!"](https://media.giphy.com/media/6brH8dM3zeMyA/giphy.gif)

Photo by Mikołaj on Unsplash

Latest comments (31)

vallerydelexy • Mar 4 '22

i have learned useState and useEffect .
i will learn React.createContext and useContext for next week

Nick Taylor • Mar 4 '22

Awesome!

Md. Maruf Sarker • Mar 2 '22

Understood some source code of Golang (web development).
Vuejs routing concept
Complete a markdown project
Learning tailwind CSS
Create subtitle for content etc

Nick Taylor • Mar 2 '22

Raeshelle Rose • Feb 27 '22

I've been learning (re-learning) JavaScript basics. I'm already familiar with conditionals, and variables so it's not going too bad!

Nick Taylor • Feb 28 '22

Jason • Feb 27 '22

I learned something through AWS integration related sessions, also learned ML's random forest, recapped some basic statistic math in probability.

Nick Taylor • Feb 28 '22

Liv • Feb 27 '22

Learned to program a speech-to-text and make it listen to words.

cubiclesocial • Feb 27 '22

I learned that Gmail has a 102KB limitation for displaying the content of an email (minus attachments). Why 102KB instead of 100KB? Probably to allow for email headers.

I also released xcron this week:

xcron/xcrontab

xcron is the souped up, modernized cron/Task Scheduler for Windows, Mac OSX, Linux, and FreeBSD server and desktop operating systems. MIT or LGPL.

Everything you have ever desired to have in cron/Task Scheduling/Job Scheduling system software. And then some.

xcron is the reference implementation of the Job Scheduler Feature/Attribute/Behavior Standard (JSFABS) and is 94.2% JSFABS-compliant.

Features

Runs on Windows, Mac OSX, Linux, and FreeBSD server and desktop operating systems.
Sane job scheduling queues. No more runaway job schedules or data corruption due to job overlap that plagues cron-based systems.
Use JSON to define named job schedules and named notification targets in a mostly familiar crontab-like format.
Picks up and runs missed jobs. Also auto-delays running missed jobs near system boot.
Can run jobs at boot and also set a minimum system uptime per job schedule.
Supports randomized configurable delay per job schedule.
Can set the timezone and base weekday…

View on GitHub

There was a LOT of learning that went into making it over the past year. Getting software to work with feature parity on all supported platforms is rather challenging. Getting feature parity on Windows is especially tough when stuff has to be done that literally no one else in the world has done before:

The crickets were sounding pretty hard on Google Search through a good chunk of xcron's development.

Nick Taylor • Feb 27 '22

Luke Westby • Feb 26 '22

I learned that running a Kafka cluster costs a lot of money

Mukund Raghav Sharma (Moko) • Feb 26 '22

Almost 56% through a course on the Essentials of Garbage Collection and writing notes here.
Learnt how to build the clr runtime, debug through gc.cpp's functions.
Understood how to configure heap affinitization for the .NET GC via this post.
Linux has no concept of CPU groups like how Windows does for > 64 cores.