Amanda Hinchman-Dominguez

@amanda-hinchman

Android | co-org of Chicago Kotlin User Group, coauthor of O'Reilly's "Programming Android w/ Kotlin" | Probably other stuff Patreon:

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Amanda Hinchman-Dominguez@amanda-hinchman· 6d

So I'm reading "A Philosophy of Software Design". When a team bans documentation for "self-documenting code", you often end up with shallow wrappers like this. This passes cognitive load to the reader, and conflates code with intent. Good documentation isn't a code-smell when it's a deep module 😉

Here is an extreme example of a shallow method, taken from a project in a
software design class:
private void addNullValueForAttribute(String attribute) {
data.put(attribute, null);
}
From the standpoint of managing complexity, this method makes things worse,
not better. The method offers no abstraction, since all of its functionality is
visible through its interface. For example, callers probably need to know that the
attribute will be stored in the data variable. It is no simpler to think about the
interface than to think about the full implementation. If the method is
documented properly, the documentation will be longer than the method’s code.
It even takes more keystrokes to invoke the method than it would take for a caller
to manipulate the data variable directly. The method adds complexity (in the
form of a new interface for developers to learn) but provides no compensating
benefit.

Amanda Hinchman-Dominguez@amanda-hinchman· 10d

Digging into K2 compiler updates & seeing so much regurgitated info without attribution. 😬 Huge thanks to @ktacademy.bsky.social for citing original work, including mine! It means the world to me to see research properly credited. Ya'll are legit 💯 kt.academy/article/ak-c...

Each backend shares a part that transforms the representation provided by the frontend into Kotlin intermediate representation, which is used to generate target-specific files.

You can find detailed descriptions of how the compiler frontend and the compiler backend work in many presentations and articles, like those by Amanda Hinchman-Dominguez or Mikhail Glukhikh. I won’t go into detail here because we’ve already covered everything we need in order to talk about compiler plugins.

Amanda Hinchman-Dominguez@amanda-hinchman· 15d

Just published a new web page just for interview prep. Look how cute it looks 😍 codingkinetics.com/get-intervie...

Screenshot of coding Kinetics website titled get interview ready. Beneath is a downloadable whiteboarding survival kit and online prep

Amanda Hinchman-Dominguez@amanda-hinchman· 21d

Were you able to guess option B? If you did, can you explain why, and how to fix it?

The answer is B - SupervisorJob severed the parent-child cancellation link! Can you explain why, and how to fix it? See the repost Alt Text for the problem once more.

Amanda Hinchman-Dominguez@amanda-hinchman· 22d

Engineers, this coroutines puzzle is for you! Take a look at the code. The request failed, and requestScope.cancel() was explicitly called in onFailure. Why is the OCR engine still running in the background? You have 24 hours 😉 Check again in a day for the answer and part 2 of this challenge.

The request failed, and requestScope.cancel() was explicitly called in the onFailure block. Why is the OCR engine still running in the background?

fun processUpload(requestScope: CoroutineScope): CoroutineScope {
val processScope = CoroutineScope(requestScope.coroutineContext + SupervisorJob())

processScope.launch {
while (isActive) {
println(" Processing PDF OCR chunk...")
delay(30.milliseconds)
}
}

throw IOException("Client disconnected!")
}

fun main() = runBlocking {
val requestScope =
CoroutineScope(Dispatchers.Default + Job())

runCatching {
processUpload(requestScope)
}.onFailure {
println("Client disconnected")
requestScope.cancel()
}

delay(1000.milliseconds)
}

A) requestScope.cancel() wasn't called in
time.
B) SupervisorJob severed the parent-child
cancellation link.
C) runCatching swallowed the
CancellationException.
D) while (isActive) does

Amanda Hinchman-Dominguez@amanda-hinchman· 23d

Chicago Kotlin User Group finally has its first event of the year! Join us at PACH for a beginner-friendly Kotlin Multiplatform & BLE workshop guided by Kartik Prakash! Bring a laptop, pair up, & build with IoT. When: July 30th Time: 5:30pm-8:00pm www.eventbrite.com/e/ckug-x-ctl...

CKUG x CTLC KMP-Bluetooth devices at Pilsen Arts Community House
July 30th at 5:30pm

Amanda Hinchman-Dominguez@amanda-hinchman· Jul 9

AI Monitoring Forensics project is ready to run on my Raspberry Pi now. Wish me luck, and let's hope it doesn't fry on the first run. I didn't have a monitor to connect to it, and I'm on a new router so I plugged it right into my monitor, used nmap to find the new IP address and ssh'd in 😎

Hacker in a coffee shop with a sick mullet

Amanda Hinchman-Dominguez@amanda-hinchman· Jul 7

idk it's starting to look like something to talk about

Screenshot of visual benchmarking with CPU consumption and token expenditure

Amanda Hinchman-Dominguez@amanda-hinchman· Jul 4

That's better. No wait, hold on this might be hard to read

Ollama Forensics Perf monitoring gets a new makeover from the default purples to a dark set of colors

Amanda Hinchman-Dominguez@amanda-hinchman· Jul 4

Just realized something. btop is saying that ollama is running 49% CPU but looking at how all the cores are actually running at capacity, it's clearly taking up multiple cores. I will need to do a little bit of math here to calculate global process load.

Screenshot of project with btop + running ollama job

Amanda Hinchman-Dominguez@amanda-hinchman· Jun 26

Even a tiny local model like llama 3.2B consumes the majority of my 2.4 GHz 8-Core Intel Core i9

Btop imaging shows major CPU consumption until the job finishes

Amanda Hinchman-Dominguez@amanda-hinchman· Jun 20

I've updated my website to include this summer's in-person events on codingkinetics.com. Take a look and check out the new content!

Screenshot of the codingkinetics homepage. A doodle exists on the left with different people playing a game together. On the right, there's a get started button under "unlock your Kotlin mastery: a curated learning expereince made with expertise". Underneath that are the new events.

Amanda Hinchman-Dominguez@amanda-hinchman· Jun 19

@droidcon.bsky.social you're a real one for this ✊ If you've been laid off or you're a student in the US, Droidcon USA has made the conference extremely accessible. Networking is *the* way to survive tech, so take the leap and come make some friends in Orlando! usa.droidcon.com

droidCon USA Layoff ticket $99. The solidarity ticket. We've got you. Please provide a short explanation or proof of your eligibility for the ticket category global@droidcon.de

droidcon USA Student Ticket USD $249.00
Must be currently enrolled full-time at a university to be eligible. Please present a valid student ID or proof of enrollment or entry

Amanda Hinchman-Dominguez@amanda-hinchman· Jun 18

Coding Kinetics is going global 🔥 Which event are you most excited for? July 15 • Chicago, IL | Harold Washington Library - HTML Workshop July 16 - 17 |Droidcon Orlando, FL - Applying Mobile Forensics to AI Perf September 18 • Leuven, Belgium | KTConf Kotlin Coroutines Forensics Masterclass

Community Workshops
Upcoming In-Person Events
FREE
For the Community
July 15 • Chicago, IL, USA
Harold Washington Library - HTML Workshop
July 16 - 17 • Orlando, FL, USA
Droidcon Orlando - Applying Mobile Forensics to AI Performance
SPEAKING & Technical masterclasses
September 18 • Leuven, Belgium
KTConf Kotlin Coroutines Forensics Master class

Amanda Hinchman-Dominguez@amanda-hinchman· Jun 15

2 months ago, a tech news site bought my data so they could call my personal number + ask about a previous employer. Keep an eye out for tomorrow's post on my experience with DeleteMe. Until then, access the full cybersecurity collection: www.patreon.com/collection/1...

Amanda Hinchman-Dominguez@amanda-hinchman· May 26

See you in Orlando, @droidcon.bsky.social

Amanda Hinchman-Dominguez@amanda-hinchman· May 1

Cooking up the next article on Medium on stress testing concurrency with unit testing. Calling this one the "Cattle-Herding Pattern" to describe the mechanism behind it. Also here's a photo of my abuelita's cows for the cute cow tax

Detecting Concurrency Bugs with Kotlin/Java Unit Testing with the Cattle-Herding Pattern

Making Use of CountDownLatch, CyclicBarrier, and ThreadPool Executors to Stress Test Concurrency

Beautiful brown and white calves roaming freely in tall luscious green grass

Amanda Hinchman-Dominguez@amanda-hinchman· Apr 7

My face when one of the first files I open in Ollama's LLM contains thread leaks

Amanda Hinchman-Dominguez@amanda-hinchman· Apr 6

Learned the hard way. Don't leave in an SSD overnight in a pi after you've finished partitioning the drive 💀

Canakit Raspberry Pi model 4 plugged in with a SATA reader and a 200 GB Intell SSD

Amanda Hinchman-Dominguez@amanda-hinchman· Mar 22

Nuked the flash drive immediately 😔 Waited a week for ebay to ship a $32 128GB SDD, maybe this one won't get a heart attack

A Raspberry canakit case now attached to an Intell SDD 3700 Series

Amanda Hinchman-Dominguez@amanda-hinchman· Feb 24

I'm excited to try it out. Even for those not looking for a job, these are great exercises to make you a better engineer.

Less panic. More pattern matching.
Build algorithmic muscle Algorithmic Rhythms
memory in just 4 weeks.

Bringing you the calm and confidence for
the whiteboard interview.
When March 1-30
Where Patreon, delivered by phone/email
Weekly program:
« Notecard Tuesdays
« AV Wednesdays
« Low Rep Thursdays

How to join in 3 easy steps
1.Download Patreon
2.Join Cowboys membership.
Bl S 3.Cancel anytime for 1 month access
coding kinetics

Algorithmic Rhythms
March 1-30
Week 1: Arrays/Strings
Loops, arrays, and conditionals
Week 2: Dynamic Programming
1D and 2D patterns to build confidence
Week 3: HashMaps
Dictionary/map thinking
Week 4: Graphs LUE
Intro to scalability 7

Amanda Hinchman-Dominguez@amanda-hinchman· Nov 24

Last week on Patreon: how to trim a .webm file from Android Studio with terminal www.patreon.com/posts/143906...

Screenshot of Android studio recording tool of emulator

Amanda Hinchman-Dominguez@amanda-hinchman· Nov 12

The HTML workshop at the Harold Washington Library was a success! It was an absolute joy to see people's faces light up when they realized they had published a website in 2 hours. Remember what your first coding project was like? mistylucky-r.github.io

10th floor of the Harold Washington Library was gorgeous - see through glass for a ceiling structured by bronze structure now green with a criss-cross of windows and bronze. Blue sky shown above.

An attendee opens their first repository. On one half of the screen is a web editor with a half-rendered web page

Two woman have GitHub and and a css page open

A selfie of a smiling woman at the library wearing black and brown

Amanda Hinchman-Dominguez@amanda-hinchman· Nov 9

High five to all the folks making sure their third-party plugins aren't collecting crazy data from people 🙏

Amanda Hinchman-Dominguez@amanda-hinchman· Aug 25

Oh yeah, it's a "war zone" in Chicago

Farmers market on a Sunday. Tents bristling with business

A massive picnic in Humboldt Park. The Sears tower serves as a backdrop on a beautiful summer day

A wine event in a garden in a neighborhood

Driving range. Every station taken up by golfers of all ages

Amanda Hinchman-Dominguez@amanda-hinchman· Aug 18

Cowboy patrons voted 🤠 here is a deep dive on coroutine cancellation and exception mechanisms available for all on Medium: medium.com/coding-kinet...

Introduction to Structured Concurrency: Coroutine Exceptions and Cancellations

Amanda Hinchman-Dominguez@amanda-hinchman· Aug 12

Whew. Almost done with reviews for @droidcon.bsky.social Academy.

A computer opened to the book draft with a matcha latte on the left under a shady bungalow. In the back is red brick wall and vines growing over the brick walls.

Amanda Hinchman-Dominguez@amanda-hinchman· Aug 5

One of the hardest problems to solve with concurrency is catching nondeterministic bugs. I've created a must-read deep dive for my paying patrons that provides a robust pattern on "Unit Testing Concurrency + Caching". Support my work and get instant access here: www.patreon.com/amandahinchm...

[Deep Dive] Unit Testing Java Concurrency + Caching
This pattern is ideal for stress-testing shared state or synchronization logic. It helps catch non-deterministic bugs (e.g., race conditions

Amanda Hinchman-Dominguez@amanda-hinchman· Aug 1

I know it's not cool to wear a mask, but breathing in wildfire every summer is bound to lead to long-term health issues 😬

Amanda Hinchman-Dominguez@amanda-hinchman· Jul 17

This week on Patreon: Cowboy votes have been casted! My next Medium article on coroutine cancellations and exceptions. It's always the one I don't want to do that gets chosen 😂