djspiewak

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

1. CPU-bound
2. Blocking IO
3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

chris-hatton

package datasizeformatter

import kotlin.math.abs
import kotlin.math.pow
import kotlin.math.roundToLong

/**
 * Format a human-readable representation of data size, in binary base form.
 * e.g. 1024 -> 1 KiB
 * @param byteCount The number of bytes to represent in human-readable form. `Long.MIN_VALUE` is unsupported.

androidfred

Kotlin Arrow

A lot of Kotlin features can be traced back to functional programming languages, eg

• Heavy use of immutability-by-default and map, filter etc functions
• Type inference
• Data classes (which enable pattern matching)
• Null safety and dealing with the absence of values

However, Kotlin is missing many incredibly useful data types that are ubiquitous in functional programming languages, eg Either, Try etc.

billmote

<?xml version="1.0" encoding="utf-8"?>
<!-- Add this as a debug manifest so the permissions won't be required by your production app -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
</manifest>

elizarov

import kotlinx.coroutines.*
import kotlin.coroutines.*

/**
 * Scope interface to control (pause & resume) timeout
 */
interface TimerScope : CoroutineScope {
    fun pause()
    fun resume()
}

gildor

import com.google.protobuf.gradle.protobuf
import com.google.protobuf.gradle.protoc

plugins {
    java
    idea
    id("com.google.protobuf") version "0.8.7"
}

repositories {

aahlenst

/*
 * The MIT License
 * 
 * Copyright (c) 2016 Andreas Ahlenstorf
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is

LordRaydenMK

@Retention(AnnotationRetention.BINARY)
@Target(AnnotationTarget.CLASS)
annotation class ValueClass

timrijckaert

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="be.rijckaert.tim.disableanimations">
    <!-- Place this permission in your debug folder -->
    <uses-permission android:name="android.permission.SET_ANIMATION_SCALE"/>

</manifest>

colomboe

// Porting of https://gist.github.com/jdegoes/dd66656382247dc5b7228fb0f2cb97c8

typealias UserID = String
data class UserProfile(val name: String)

// The database module:
interface DatabaseService {
    suspend fun dbLookup(id: UserID): UserProfile
    suspend fun dbUpdate(id: UserID, profile: UserProfile)
}