Jesse Squires jessesquires

Intro to Python

Assumes a start with Python 3.6. Python 2.7 is end of life in 2020, so new projects should avoid it.

Important PEPs

PEPs (Python Enhancement Proposals) are how new features are added to the language and are very useful for learning why things are the way they are.

Some also offer style guidance.

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

React & Elm inspired frameworks in Swift

This is a curated list of iOS (Swift & ObjC) frameworks which are inspired by React and Elm.

Swift frameworks

React-inspired

ReactSwift by @ColinEberhardt
https://github.com/ColinEberhardt/ReactSwift

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

GPG and git on macOS

Setup

No need for homebrew or anything like that. Works with https://www.git-tower.com and the command line.

Install https://gpgtools.org -- I'd suggest to do a customized install and deselect GPGMail.
Create or import a key -- see below for https://keybase.io
Run gpg --list-secret-keys and look for sec, use the key ID for the next step
Configure git to use GPG -- replace the key with the one from gpg --list-secret-keys

	#!/bin/bash
	for f in `ls *.gyb`
	do
	echo "Processing $f"
	name=${f%.gyb}
	../../../utils/gyb -D CMAKE_SIZEOF_VOID_P=8 -o $name $f --line-directive ""
	done

	#warning This still misses safeguards and has private API references in it. Use only when you really know what you're doing!

	// pspdf_swizzleSelectorWithBlock not provided. Use your swizzling helper of choice
	// (e.g. http://petersteinberger.com/blog/2014/a-story-about-swizzling-the-right-way-and-touch-forwarding/)

	// Fixes rdar://26295020
	static void PSPDFInstallWorkaroundForSheetPresentationIssue26295020(void) {
	__block auto removeWorkaround = ^{};
	const auto installWorkaround = ^{
	const SEL presentSEL = @selector(presentViewController:animated:completion:);

	#!/bin/sh

	defaults read com.apple.finder CreateDesktop > /dev/null 2>&1
	enabled=$?

	if [ "$1" = "off" ]; then
	if [ $enabled -eq 1 ]; then
	defaults write com.apple.finder CreateDesktop false
	osascript -e 'tell application "Finder" to quit'
	open -a Finder

	import Cocoa
	import MASShortcut

	func pow() {
	let rect = NSScreen.mainScreen()?.frame
	let window = NSWindow(contentRect: rect!, styleMask: NSBorderlessWindowMask, backing: .Buffered, `defer`: false)
	window.backgroundColor = NSColor.clearColor()
	window.opaque = false
	window.alphaValue = 1
	window.makeKeyAndOrderFront(NSApplication.sharedApplication())

	# blog post
	#
	# https://www.jessesquires.com/blog/customizing-git-log/

	git log --graph --pretty=format:'commit: %C(bold red)%h%Creset %C(red)<%H>%Creset %C(bold magenta)%d %Creset%ndate: %C(bold yellow)%cd %Creset%C(yellow)%cr%Creset%nauthor: %C(bold blue)%an%Creset %C(blue)<%ae>%Creset%n%C(cyan)%s%n%Creset'