Arnaud Joubay sowenjub

Firebase Environments

Last updated: October 21st, 2019.

At the time of writing this gist (January 4th, 2017), I was unable to find true sandboxing to separate development and production environments for a Firebase project. The closest we can get is to create two separate Firebase projects -- one for development and one for production.

Pros

Complete separation and isolation of all Firebase features.
Freedom to experiment without risking the corruption of production data.

Cons

First, check your current config (example output in homebrew.mxcl.postgresql.plist.xml lower down in this gist):

cat ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

Most importantly, note the -D /usr/local/var/postgres argument.

Second, shut down your current PostgreSQL.

launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

Author: https://www.cyanhall.com/

1. The Layer Tree

Core Animation's original name is Layer Kit

Core Animation is a compositing engine; its job is to compose different pieces of visual content on the screen, and to do so as fast as possible. The content in question is divided into individual layers stored in a hierarchy known as the layer tree. This tree forms the underpinning for all of UIKit, and for everything that you see on the screen in an iOS application.

In UIView, tasks such as rendering, layout and animation are all managed by a Core Animation class called CALayer. The only major feature of UIView that isn’t handled by CALayer is user interaction.

There are four hierarchies, each performing a different role:

	var _fetchedResultsController: NSFetchedResultsController<Entity>? = nil
	var blockOperations: [BlockOperation] = []

	var fetchedResultController: NSFetchedResultsController<Entity> {
	if _fetchedResultsController != nil {
	return _fetchedResultsController!
	}

	let fetchRequest: NSFetchRequest<Entity> = Entity.fetchRequest()
	let managedObjectContext = (UIApplication.shared.delegate as! AppDelegate).managedObjectContext!

	import UIKit

	extension UIImage {

	// colorize image with given tint color
	// this is similar to Photoshop's "Color" layer blend mode
	// this is perfect for non-greyscale source images, and images that have both highlights and shadows that should be preserved
	// white will stay white and black will stay black as the lightness of the image is preserved
	func tint(tintColor: UIColor) -> UIImage {

	# The trick is to link the DeviceSupport folder from the beta to the stable version.
	# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

	# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
	sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

	# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

	# (A similar approach works for older versions too, just change the version number after DeviceSupport)

	//
	// UIBarButtonItem+Badge.swift
	// PiGuardMobile
	//
	// Created by Stefano Vettor on 12/04/16.
	// Copyright © 2016 Stefano Vettor. All rights reserved.
	//

	import UIKit

	let styles: [UIFont.TextStyle] = [
	// iOS 17
	.extraLargeTitle, .extraLargeTitle2,
	// iOS 11
	.largeTitle,
	// iOS 9
	.title1, .title2, .title3, .callout,
	// iOS 7
	.headline, .subheadline, .body, .footnote, .caption1, .caption2,
	]

	# create custom tags for redcarpet to insert youtube\|vimeo iframes in
	# your document.
	# ::usage:: vid(youtube, 123456)

	class VideoMarkdownRenderer < Redcarpet::Render::HTML
	include ActionView::Helpers::AssetTagHelper

	def preprocess(document)
	# scans for: vid(provider, id)
	# e.g. vid(youtube,12345)