darktable

/* **************************************************************************
   Copyright 2012 Calvin Rien
   (http://the.darktable.com)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

andyzinsser

// request Game Center verification data for localPlayer from apple
- (void)authenticateGameCenterPlayer:(GKLocalPlayer *)localPlayer
{
    [localPlayer generateIdentityVerificationSignatureWithCompletionHandler:^(NSURL *publicKeyUrl, NSData *signature, NSData *salt, uint64_t timestamp, NSError *error) {
        if (error) {
            NSLog(@"ERROR: %@", error);
        }
        else {
            // package data to be sent to server for verification
            NSDictionary *params = @{@"publicKeyUrl": publicKeyUrl,

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

mrk-han

Install and Create Emulators using AVDMANAGER and SDKMANAGER

TL;DR

For an emulator that mimics a Pixel 5 Device with Google APIs and ARM architecture (for an M1/M2 Macbook):

1. List All System Images Available for Download: sdkmanager --list | grep system-images

2. Download Image: sdkmanager --install "system-images;android-30;google_atd;arm64-v8a"

lukebrandonfarrell

const initialState = {
  type: null,
  payload: null,
  meta: null,
  error: false
};

export default (state = initialState, action) => {
  return {
    ...state,