progrium

Key Points

• In general, binaries built just for x86 architecture will automatically be run in x86 mode
• You can force apps in Rosetta 2 / x86 mode by right-clicking app, click Get Info, check "Open using Rosetta"
• You can force command-line apps by prefixing with arch -x86_64, for example arch -x86_64 go
• Running a shell in this mode means you don't have to prefix commands: arch -x86_64 zsh then go or whatever
• Don't just immediately install Homebrew as usual. It should most likely be installed in x86 mode.

Homebrew

Not all toolchains and libraries properly support M1 arm64 chips just yet. Although

steipete

extension UIHostingController {
    convenience public init(rootView: Content, ignoreSafeArea: Bool) {
        self.init(rootView: rootView)

        if ignoreSafeArea {
            disableSafeArea()
        }
    }

    func disableSafeArea() {

jordansinger

import SwiftUI
import PlaygroundSupport

struct Sunset: View {
    @State var backgroundColor = Color.blue 
    @State var sunSetted = false
    let sunGradient = [Color.yellow, Color.orange]
    let moonGradient = [Color.gray, Color.black]
    @State var alignment = Alignment.top
    

ronanrodrigo

# 1. Enable Google calendar sync
# 1.1. Access https://zoom.us/profile;
# 1.2. Enable "Calendar and Contact Integration";
# 2. Quit Zoom client;

sqlite3  ~/Library/Application\ Support/zoom.us/data/zoomus.db << EOF
UPDATE zoom_kv SET value = "true" WHERE key = "com.zoom.conf.enable.remind.meeting.time"; 
UPDATE zoom_kv SET value = 1 WHERE key = "com.zoom.conf.threshold.to.remind.meeting.time";
SELECT key,value FROM zoom_kv WHERE key = "com.zoom.conf.enable.remind.meeting.time";
SELECT key,value FROM zoom_kv WHERE key = "com.zoom.conf.threshold.to.remind.meeting.time";

danielt1263

Recipes for Combining Observables in RxSwift

Several operators exist to combine multiple observables into one. This document shows the basics of the various combining operators and shows some more advanced recipes using them.

Combine Latest

The combineLatest operator is used whenever you have two or more observables emitting values, and you want access to the latest value emitted from each of them whenever one of them emits a new value. It can be used, for example, to combine a username and password to make a login request:

func example(username: Observable<String>, password: Observable<String>) {

let credentials: Observable<(String, String)> = Observable.combineLatest(username, password)

tclementdev

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

lsavino

DEPRECATED for Xcode 10 🎈

(check out What's New in Swift at 11:40, slide 42)

Whole Module Compilation Optimizations: Why these terms are sometimes misleading

When you look up how to compile swift faster for debug builds, people very earnestly give advice that seems contradictory: you should "try using the whole module optimization flag," and also "never use whole module optimization for debugging". [^1]

This is confusing because some of us are using these two general words:

compilation: "turning text into an executable program"

JohnSundell

import Foundation

struct EquatableValueSequence<T: Equatable> {
    static func ==(lhs: EquatableValueSequence<T>, rhs: T) -> Bool {
        return lhs.values.contains(rhs)
    }

    static func ==(lhs: T, rhs: EquatableValueSequence<T>) -> Bool {
        return rhs == lhs
    }

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

pbochenski

java.lang.RuntimeException: Method getMainLooper in android.os.Looper not mocked. See http://g.co/androidstudio/not-mocked for details.
at android.os.Looper.getMainLooper(Looper.java)
at android.arch.core.executor.DefaultTaskExecutor.isMainThread(DefaultTaskExecutor.java:58)
at android.arch.core.executor.AppToolkitTaskExecutor.isMainThread(AppToolkitTaskExecutor.java:115)
at android.arch.lifecycle.LiveData.assertMainThread(LiveData.java:408)
at android.arch.lifecycle.LiveData.setValue(LiveData.java:290)
at android.arch.lifecycle.MutableLiveData.setValue(MutableLiveData.java:33)
at pl.pbochenski.archcomponentstest.MainViewModelTest.shouldGetPostsAndHaveACopyOfIt(MainViewModelTest.kt:48) ...