twyatt

// Configure sibling composite projects (`../<project>`) by adding `composite.<project>=true` to `local.properties`.
java.util.Properties()
    .apply {
        rootProject.projectDir
            .resolve("local.properties")
            .normalize()
            .takeIf(File::exists)
            ?.let { java.io.FileInputStream(it) }
            ?.use(::load)
    }

twyatt

// swift-tools-version:5.8

import PackageDescription

let package = Package(
    name: "MyPackage",
    platforms: [
        .iOS(.v11)
    ],
    products: [

twyatt

import kotlinx.coroutines.channels.Channel
import kotlinx.coroutines.coroutineScope

suspend fun main() = coroutineScope<Unit> {
    val receive = Channel<Int>()
    receive.cancel() // ReceiveChannel
    // java.util.concurrent.CancellationException: RendezvousChannel was cancelled
    runCatching { receive.send(1) }.onFailure { println(it) }

    val send = Channel<Int>()

twyatt

import kotlinx.coroutines.Deferred
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.supervisorScope

suspend fun <T> Deferred<T>.awaitCatching(launchNumber: Int, startTime: Long) = try {
    await()
} catch (t: Throwable) {

twyatt

The invokeOnCompletion will always be invoked, but it has a number of different characteristics vs. its try counterpart.

try-catch-finally	invokeOnCompletion
suspend functionality Predictable threading/context Familiar semantics Adheres to Coroutine cancellation	Blocking execution on arbitrary thread No guarantees around execution timing Implementation must be fast, non-blocking, and thread-safe Exceptions are wrapped with CompletionHandlerException1

GlobalScope.launch(Dispatchers.IO) {
    try {
 // todo

twyatt

HTTPie

brew install httpie

bat

brew install bat

twyatt

CBOR cheatsheet

Major type	Description	Binary	Shorthand
0	an unsigned integer	000_xxxxx	unsigned(#)
1	a negative integer	001_xxxxx	negative(#-1)
2	a byte string	010_xxxxx	bytes(n)
3	a text string	011_xxxxx	text(n)
4	an array of data items	100_xxxxx	array(n)
5	a map of pairs of data items	101_xxxxx	map(n)

twyatt

pollChars
← CharData(value=a)
← CharData(value=b)
pollNumbers
← NumberData(value=-1)
← NumberData(value=0)
← NumberData(value=1)
pollChars
← CharData(value=c)
pollNumbers

twyatt

package com.example.myapplication

import android.bluetooth.BluetoothGattCharacteristic
import android.bluetooth.BluetoothGattService
import com.juul.able.experimental.Gatt
import com.juul.able.experimental.WriteType
import com.juul.able.experimental.throwable.writeCharacteristicOrThrow
import java.util.UUID

class GattServiceNotFound(uuid: UUID) : Exception("GATT service $uuid not found.")

twyatt

/**
 * Prevent emissions from receiver until after [trigger] emits a value that satisfies [predicate].
 */
private fun <T, R> LiveData<T>.allowAfter(
    trigger: LiveData<R>,
    predicate: (R?) -> Boolean
) = object : MediatorLiveData<T?>() {

    private var isReady = false
    private var hasValue = false