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View Host.kt
interface Host {
suspend fun getMovies(): List<Movies>
suspend fun setWatched(movie: Movie): Boolean
class HostImpl(
// You could have a different WorkerPool for each system you need to talk to
// that has its own throttling requirements.
private val workerPool: WorkerPool
zach-klippenstein / DatabaseWorkerPool.kt
Created Oct 24, 2018
Sketch of what a worker pool for limiting concurrent database operations might look like.
View DatabaseWorkerPool.kt
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.Channel
import kotlin.coroutines.CoroutineContext
import kotlin.coroutines.coroutineContext
class DatabaseExecutor(
nWorkers: Int,
context: CoroutineContext
) {
View CoroutineNamesTest.kt
class CoroutineNamesTest {
@Test fun coroutineNames() {
runBlocking(CoroutineName("parent")) {
println("parent: $coroutineContext")
launch {
println("unnamed child: $coroutineContext")
launch(CoroutineName("named child")) {
zach-klippenstein / SelectClauses.kt
Last active Jun 1, 2019
Helper methods to build select clauses for Kotlin coroutines
View SelectClauses.kt
package com.zachklipp.coroutines
import kotlinx.coroutines.experimental.DisposableHandle
import kotlinx.coroutines.experimental.intrinsics.startCoroutineCancellable
import kotlinx.coroutines.experimental.selects.SelectClause0
import kotlinx.coroutines.experimental.selects.SelectClause1
import kotlinx.coroutines.experimental.selects.SelectClause2
import kotlinx.coroutines.experimental.selects.SelectInstance
zach-klippenstein /
Last active Aug 29, 2015
Shell script for amending commits on a feature branch.
if [ "$1" = '-h' ]; then
cat <<-EOF
Usage: git-edit <branch> [args-to-commit]
e.g. If your tree looks like this:
* cc3cd23 (HEAD -> feat1) Feature 1.2
* 53f56c1 Feature 1
* 08355e5 (master) Initial commit.
zach-klippenstein / audiowave.go
Last active Dec 26, 2018
Terminal program that plays a sine wave.
View audiowave.go
//usr/local/bin/go run $0 "$@"; exit
Terminal program that plays a sine wave.
The pitch and volume can be controlled (help is shown in the UI).
go get
zach-klippenstein / FunctionalStack.kt
Created Jan 31, 2015
Example of a simple functional data structure in Kotlin.
View FunctionalStack.kt
package com.example.funcstack
import java.util.NoSuchElementException
public trait FunctionalStack<out T> {
public val size: Int
public fun pop(): Pair<T, FunctionalStack<T>>
zach-klippenstein / source_bench_test.go
Last active Aug 29, 2015
Comparative benchmarks of various methods of providing RNG sources to concurrent goroutines.
View source_bench_test.go
package source_bench_test
import (
// See
zach-klippenstein / floatcomp_test.go
Last active Aug 29, 2015
Float Comparison Benchmark: Subtraction vs Multiplication
View floatcomp_test.go
package main
import (
const DELTA_MULT = 10000000000

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