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twyatt / solution.kt
Created December 20, 2018 23:45
Example code for "The Tale of the Misleading Coroutine Stacktrace" article
import kotlinx.coroutines.channels.Channel
import kotlinx.coroutines.channels.Channel.Factory.CONFLATED
import kotlinx.coroutines.channels.ClosedReceiveChannelException
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
class SourceClosed(cause: Throwable) : IllegalStateException(cause)
fun main(args: Array<String>) = runBlocking<Unit> {
@twyatt
twyatt / example.kt
Created December 20, 2018 23:44
Example code for "The Tale of the Misleading Coroutine Stacktrace" article
import kotlinx.coroutines.channels.*
import kotlinx.coroutines.channels.Channel.Factory.CONFLATED
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
fun main(args: Array<String>) = runBlocking<Unit> {
val channel = Channel<Int>(CONFLATED)
launch {
@twyatt
twyatt / closing-channel1-console-log.md
Last active October 5, 2018 20:37
Demonstrates wrapping a callback based class to provide interaction via Kotlin Coroutine Channels

Demonstrates closing channel 1. Channel 2 continues to be consumable (wrapper is not closed).

(cancelMode = CancelMode.CHANNEL)

main → threads=[Monitor Ctrl-Break, Signal Dispatcher, Finalizer, main @coroutine#1, Reference Handler]
Wrapper[1] → createChannel → <start>
Wrapper[1] → client.observe
Client → observe
Client → observe → thread → handler.onResponse(0)
Wrapper[1] → onResponse → <start>
@twyatt
twyatt / coroutines-actor-close-thread-test.kt
Last active March 22, 2018 00:21
Testing Kotlin Coroutines when using `newSingleThreadContext` (Thread is not being cleaned up)
import kotlinx.coroutines.experimental.channels.actor
import kotlinx.coroutines.experimental.channels.consumeEach
import kotlinx.coroutines.experimental.newSingleThreadContext
import kotlinx.coroutines.experimental.runBlocking
val threads: Set<Thread>
get() = Thread.getAllStackTraces().keys
val threadNames: List<String>
get() = threads.map { it.name }
@twyatt
twyatt / .gitconfig
Last active February 21, 2018 17:34
[user]
name = Travis Wyatt
email = <REDACTED>
[alias]
co = checkout
br = branch
st = status
wip = !git add --verbose --all && git commit --all --verbose --message='wip'
history = log --all --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --date=relative
import io.reactivex.Observable
import io.reactivex.Single
import io.reactivex.observers.DisposableObserver
import io.reactivex.schedulers.Schedulers
fun main(args: Array<String>) {
val list = listOf(3, 2, 1)
val list2 = listOf(1f, 7f, 8f)
Observable.fromIterable(list)
typealias ColorFunction = (currentTimeMillis: Long) -> Int
class CustomView : View {
val paint = Paint()
var colorFunction: ColorFunction? = null
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
@twyatt
twyatt / letter_grade.gdoc
Created July 8, 2017 01:41
Google Sheet formula for determining letter grade from score.
=IF(A1>89,"A",IF(A1>79,"B",IF(A1>69,"C",IF(A1>59,"D","F"))))
@twyatt
twyatt / flagparse-example.c
Created April 29, 2015 23:54
CS 320 flag parsing
// parse command line arguments for flags (i.e. help and output filename)
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') { /* flag */
if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
usage(argv[0]);
exit(EXIT_SUCCESS);
}
if (strcmp(argv[i], "-o") == 0) {
if (i >= argc - 1) {
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.print.PrinterJob;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class PrintTest extends Application {