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SwiftUI

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SwiftUI
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@steipete
steipete / KeyCommand.swift
Last active January 13, 2025 20:01
Add Keyboard Shortcuts to SwiftUI on iOS 13 when using `UIHostingController`. Requires using KeyboardEnabledHostingController as hosting class) See https://steipete.com/posts/fixing-keyboardshortcut-in-swiftui/
//
// KeyCommand.swift
// Adds Keyboard Shortcuts to SwiftUI on iOS 13
// See https://steipete.com/posts/fixing-keyboardshortcut-in-swiftui/
// License: MIT
//
// Usage: (wrap view in `KeyboardEnabledHostingController`)
// Button(action: {
// print("Button Tapped!!")
// }) {
@talaviram
talaviram / add_debug_entitlement.sh
Last active February 20, 2025 20:42
Simple Utility Script for allowing debug of hardened macOS apps.
#! /bin/bash
# Simple Utility Script for allowing debug of hardened macOS apps.
# This is useful mostly for plug-in developer that would like keep developing without turning SIP off.
# Credit for idea goes to (McMartin): https://forum.juce.com/t/apple-gatekeeper-notarised-distributables/29952/57?u=ttg
# Update 2022-03-10: Based on Fabian's feedback, add capability to inject DYLD for sanitizers.
#
# Please note:
# - Modern Logic (on M1s) uses `AUHostingService` which resides within the system thus not patchable and REQUIRES to turn-off SIP.
# - Some hosts uses separate plug-in scanning or sandboxing.
# if that's the case, it's required to patch those (if needed) and attach debugger to them instead.
@breeno
breeno / CompositionalTwoColumnWaterfall.swift
Last active October 31, 2022 12:57
Simple take on a compositional layout with 2 column variable height items waterfall
import UIKit
class ViewController: UIViewController {
enum Section {
case main
}
struct Item: Hashable {
let height: CGFloat
As of iOS 11/macOS High Sierra, and only including ones in Foundation and CoreFoundation
Strings:
_NSCFString - a CFStringRef or CFMutableStringRef. This is the most common type of string object currently.
- May have 8 bit (ASCII) or 16 bit (UTF-16) backing store
_NSCFConstantString - a compile time constant CFStringRef, like you'd get with @"foo"
- May also be generated by dynamic string creation if matches a string in a pre-baked table of common strings called the StringROM
NSBigMutableString - an NSString backed by a CFStorage (https://github.com/opensource-apple/CF/blob/master/CFStorage.h) for faster handling of very large strings
NSCheapMutableString - a very limited NSMutableString that allows for zero-copy initialization. Used in NSFileManager for temporarily wrapping stack buffers.
@josephsieh
josephsieh / CGImage Rotation.png
Last active January 26, 2024 16:12
Rotate CGImage 90 degree clock wise
CGImage Rotation.png
@Jiwan
Jiwan / main.cpp
Created October 31, 2015 19:27
C++ 14 example SFINAE!
#include <boost/hana.hpp>
#include <iostream>
#include <type_traits>
struct A {};
std::string to_string(const A&)
{
return "I am a A!";
}
@facelordgists
facelordgists / delete-git-recursively.sh
Created May 13, 2015 05:28
Recursively remove .git folders
( find . -type d -name ".git" && find . -name ".gitignore" && find . -name ".gitmodules" ) | xargs rm -rf

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

/*
Original comments from Apple:
File: MixerHostAudio.m
Abstract: Audio object: Handles all audio tasks for the application.
Version: 1.0
@xjones
xjones / TransitionController.h
Created November 26, 2011 03:48
TransitionController for animating iOS view controller transitions w/o a controller stack
//
// TransitionController.h
//
// Created by XJones on 11/25/11.
//
#import <UIKit/UIKit.h>
@interface TransitionController : UIViewController