Drew McCormack drewmccormack

agenda.com, glisten.ist, ensembles.io

drewmccormack / MultidimensionalOptionalFlatMap.swift

Created November 17, 2017 17:14

Use flatMap with multiple optional variables, ensuring all are non-nil before making a function call.


	func flatMap<U, V, T>(_ i: U?, _ j: V?, block: (U, V)->T) -> T? {
	var result: T?
	if let i = i, let j = j { result = block(i,j) }
	return result
	}

	func flatMap<U, V, W, T>(_ i: U?, _ j: V?, _ k: W?, block: (U, V, W)->T) -> T? {
	var result: T?
	if let i = i, let j = j, let k = k { result = block(i,j,k) }

drewmccormack / email-list-set-operations.sh

Created January 18, 2018 10:20

Common set operations to perform on email lists. Assumes one email per line, and handles case insensitivity.

	# Enter two file names as arguments.
	# Will print out the ones that appear in both files.
	# This is a set intersection.
	emails-common-to-both () {
	comm -12 -i <(sort -u -f "$1") <(sort -u -f "$2");
	};

	# Enter two filenames.
	# Will print emails from first that don't appear in second.
	# This is like a set subtraction.

drewmccormack / symbolicate-sample-dump.py

Last active August 15, 2023 09:32

Symbolicates a sample dump from Activity Monitor

	#!/usr/bin/env python

	#
	# To use this, just put the DSYMS in the same directory as the sample dump file,
	# and run the script from that directory, passing the sample dump file name as only argument
	#

	import re, sys, os, subprocess

	sampleFile = sys.argv[1]

drewmccormack / LetTheCoWGo.swift

Created February 2, 2019 10:25

Demonstrates how a Swift value constant can mutate when using Copy-on-Write (CoW) and multi-threading.

	import Foundation

	struct NuclearPowerStationOperator {

	class Storage {
	var turnOffCores: Bool = false
	func copy() -> Storage {
	let new = Storage()
	new.turnOffCores = turnOffCores
	return new

drewmccormack / SimpleStruct.swift

Created February 2, 2019 16:39

Simple example of multi-threading with mutable struct.

	import Foundation

	struct Small {
	var i: Int
	var j: Int
	}

	var s = Small(i: 1, j: 2)

	DispatchQueue.global(qos: .background).async {

drewmccormack / Swift UI Format

Created June 21, 2019 13:00

	Here is some SwiftUI code I have.
	------
	NavigationView {
	List(translations) { translation in
	Button(action: {
	self.dataSource.selectedTranslationId = translation.id
	}) {
	TranslationCell(translation: translation)
	}
	}

drewmccormack / extract-glossaries.py

Created February 19, 2020 14:21

Extracts terms from Apple lg glossary files, combining into a JSON file

	#!/usr/bin/env python

	import sys, os.path
	import os
	import json
	from xml.dom.minidom import parse

	rootdir = os.getcwd()
	lgPaths = ["iOS/AuthKitUI.lg", "iOS/CalendarUIKit.lg", "iOS/iCloudDriveSettings.lg", "iOS/MobileNotes.lg", "macOS/CalendarUI.lg", "macOS/Finder_FE.lg", "macOS/Finder_FinderKit.lg", "macOS/iCloudPrefPane.lg", "macOS/Notes.lg", "macOS/Reminders.lg", "macOS/TextEdit.lg"]
	languageDirs = ["Dutch", "French"]

drewmccormack / MVVMSwiftUI.swift

Created February 25, 2020 18:39

Simple example of MMVM with SwiftUI.

	import Foundation
	import SwiftUI
	import Combine

	let dateFormatter: DateFormatter = {
	let dateFormatter = DateFormatter()
	dateFormatter.locale = Locale(identifier: "en_US_POSIX")
	dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
	return dateFormatter
	}()

drewmccormack / StateMachine.swift

Last active June 9, 2021 09:43

	//
	// Lightweight but powerful state machine.
	//
	// Usage:
	// enum TrafficLight: State {
	// case red, orange, green
	// }
	//
	// var trafficLights = StateMachine<TrafficLight>(initialState: .red)
	// trafficLights.addRoute(from: .red, to: .green)

drewmccormack / LabelUniqueSet.swift

Created August 10, 2021 09:33

Introduces a Set type that stores enums, including those with associated types, and uniques on the label rather than the value.