n0an

cd /Applications/Xcode.app/Contents/Developer/Applications/
open -n Simulator.app/

PRESS OK IN ALERT IF THERE'S ONE

Then in top menu press Hardware - Device - iOS 10.3 - SELECT MODEL

n0an

import webbrowser, time
webbrowser.open('https://stackoverflow.com/questions/tagged/ios')
time.sleep(2)
webbrowser.open('https://stackoverflow.com/questions/tagged/swift')

n0an

#! python3

import pyautogui, time, logging

logging.basicConfig(level=logging.INFO, format='%(asctime)s.%(msecs)03d: %(message)s', datefmt='%H:%M:%S')

# Set these to the correct coordinates for your particular computer.

uncheckAutoOpenPDF = (139, 522)

n0an

curl --upload-file testfile https://transfer.sh/testfile

n0an

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.

---

n0an

Here's what I would try. First run
```
diskutil list
```
to get the name to the disk you're trying to format. The below commands assume this is "disk1", but replace "disk1" with the correct disk if it's something different.

Now unmount the disk:
```
diskutil unmountDisk force disk1
```

n0an

cd ~/Library/Android/sdk/tools/bin/
./avdmanager list avd

cd ~/Library/Android/sdk/tools/
emulator @Nexus_5X_C4S_Demo

n0an

import websocket

# Get auth token via POST to /api/v1/authTokens
# Use returned token to open a websocket connection to wss://host:port/events/v1
# Token is passed as the URL parameter authToken

try:
  self.logger.info("Getting auth token ...")
  api_conn = api.ApiConnection(self.address, self.username, self.password, port=self.port)
  response = api_conn.doPost("authTokens", {})

n0an

Threads

Foundation offers a Thread class, internally based on pthread, that can be used to create new threads and execute closures.

// Detaches a new thread and uses the specified selector as the thread entry point.
Thread.detachNewThreadSelector(selector: Selector>, toTarget: Any, with: Any)

// Subclass
class MyThread: Thread {

n0an

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse