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Current Events Programming What I’m Up To

RW Community Care: Free community support for mobile developers (and aspiring mobile developers, too!)

One of the reasons I write for raywenderlich.com — the premier mobile developer tutorial site — is that they’re wonderful people to work with, because they’re such good people. And as good people, they’ve put together something to help developers during this time of pandemic and quarantine: RW Community Care. It’s a series of office hours, livestreams, bootcamps, and more, running until August 22 — and all events are 100% free!

Here’s what RW Community care offers…

Read iOS Apprentice for free!

Cover of “iOS Apprentice, 8th edition”I learned iOS programming back in 2012 by reading and doing the exercises in an earlier edition of iOS Apprentice, which was written by Matthijs Hollemans. While I’d done some mobile development as a Windows Phone Champ during my time as a developer evangelist at Microsoft, it was this book that set me on my path as a mobile developer.

I owe a lot to this book, which is why it was a big honor to co-author the eighth edition with Eli Ganim. For the summer, you can read it online for free at RW Community Care. Whether you’re completely new to programming or — like me, back in 2012, experienced at programming but new to iOS development — you should check out iOS Apprentice on RW Community Care!

RW Talks

RW Talks happen weekly, cover all sorts of topics that mobile developers will find interesting, ranging from the deeply technical to the inspiring. Upcoming talks include:

You can also see past talks:

RW Chat

Can’t attend some of the other live events, or prefer to collaborate on discussions as a community? Or maybe you’re more the type to hash out challenges or problems with a group of like-minded developers? There’s a Discord server that you can join!

Office Hours

Not everyone has easy access to a senior mobile developer, especially when everyone seems so busy these days and our teams are more physically separate then ever before.

Good news: Office Hours are the next best thing to having a senior developer right next to you!

Review My Stuff

Want a senior member of the development community to look over your current project, run a critical eye over your professional résumé, or review some code you’ve been struggling with? This program is designed to do just that.

If you need someone to help you with deeper questions on your particular project, or to lend a critical eye to your resume or job search, you need Review My Stuff!

 

Categories
Hardware Programming What I’m Up To

New life for old computers

The current coronavirus pandemic has given me a chance to do some spring cleaning at home, which in turn led me to revive some old computers that have been sitting idly in a closet. I figure I could put them to work doing interesting things.

Compaq 610 (2009-era 4GB Core 2 Duo)

Installing Peppermint on the Compaq 610.

I’ve given an old Compaq 610 a new lease on life with Peppermint OS, a lightweight Linux distro that runs really well on old machines (the Compaq is a 2009-era machine with a Core 2 Duo processor). I also installed VS Code, Node, Anaconda, and React on it, making it a lean, mean machine for that upcoming Python course I’m teaching.

My very erudite makeshift monitor stand.

In the process, I also gave some old Smalltalk-80 books a new purpose as well: propping up the monitor that goes with the Compaq.

ThinkPad T430 (2012-era 16GB Core i5)

Preparing class notes (using Jupyter notebooks) for my upcoming Python course on the ThinkPad.

I replaced the CMOS battery on my trusty ThinkPad T430 and its older version of Ubuntu with Linux Mint. Its own internal wifi card finally died, and I simply decided to simply replace it with a faster USB wifi adapter that would arrive the next day instead of getting the slower internal card that could take as long as 6 weeks to arrive.

As with the Compaq, I set up the ThinkPad with VS Code, Node, Anaconda, and React. Since it’s got the processor power and 16 GB RAM, I also put Android Studio 4 and Flutter on it. Between some mobile projects in my near future, and the need to have a machine for running servers and other automated tasks, it’s going to prove to be quite useful.

That leaves me with one last machine to update.

Raspberry Pi 3 B (2016-era 1GB ARM A53)

My Raspberry Pi, as it was back in 2016.

I got the Raspberry Pi 3 4 years ago as my one impulse purchase on Amazon Prime Day 2016 (in mid-July of that year), and made regular use of it until around early 2018, when I used it for a Sonic Pi programming demo. It was high time to bring it back to active duty.

The Raspberry Pi’s “hard drive” is actually a microSD card that fits into an easily-accessed slot near one of the edges of the board. The process of updating the Pi’s OS is pretty simple: You use the Raspberry Pi imager on another computer with an SD card slot (and a microSD-to-standard SD card adapter) to rewrite its contents.

The Raspberry Pi is a pretty good Python machine, and I may end up using it while teaching that Python course, if only to show what’s possible on a computer that’s smaller than a deck of cards (when it’s not in a case) that you can get for about $50.

Since it’s powered by an ARM chip, it offers an opportunity for a kind of programming that most other machines don’t offer: ARM assembly programming!

The actual code from the first assembly program I wrote on my newly-reformatted Raspberry Pi: A “Tiger King”-themed version of “Hello World”.

It looks like it’s going to become an ARM-based world:

  • ARM-based chips power IoT devices,
  • Smartphones are generally powered by ARM-based chips, and
  • Apple’s upcoming switch from Intel x86-based chips to their own ARM-based silicon is likely have wide-ranging impact across the PC industry.

With this upcoming sea change, it doesn’t hurt to have some familiarity with ARM assembly language. Even though smartphones have ARM chips, the Raspberry Pi is a much better platform on which to learn ARM assembly, as it allows you to do development and execution in the same place.

It may have been a while since I’ve done assembly language programming — first on the 6502 in high school on Apple ][s and Commodore PETs, and later in university on NS32000 boards connected to Digital Unix machines — but I found my return pretty simple. It didn’t take long for me to cobble together a “Hello World!”-style app on the Pi.

Watch this blog for ARM assembly tutorials!