steipete

static void PSPDFFixiOS12AccessibilityTestCrash(void) {
    let accessibilityLoaderClass = NSClassFromString(@"UIAccessibilityInformationLoader");
    let accessibilitySEL = NSSelectorFromString(@"_loadAccessibilityInformationOnMainThread:");
    __block IMP originalIMP = pspdf_swizzleSelectorWithBlock(accessibilityLoaderClass, accessibilitySEL, ^(id _self, BOOL onMainThread) {
        @try {
            ((void (*)(id, SEL, BOOL))originalIMP)(_self, accessibilitySEL, onMainThread);
        } @catch (NSException *exception) {
            NSLog(@"Exception received: %@", exception);
            if ([exception.name isEqualToString:NSInvalidArgumentException] && [exception.reason containsString:@"_accessibilityLoadAccessibilityInformation"]) {
                NSLog(@"Ignoring IOS 12b5 weirdness...");

catlan

Diff output of two lldb commands

Setup

1. Copy the contents of the last snippet (lldbinit) from the gist page, and paste into your .lldbinit file. This makes the ksdiff macro known inside lldb.
2. Put file ksdiff.py in ~/.lldb/
3. sudo pip install temp
4. Restart Xcode debug session

Example

(lldb) ksdiff ;

mattgallagher

//
//  AppDelegate.swift
//  SwiftUITestApp
//
//  Created by Matt Gallagher on 4/6/24.
//  Copyright © 2019 Matt Gallagher. All rights reserved.
//

import Cocoa
import SwiftUI

steipete

/**
 HACK around FB6940492: Mac Catalyst: Crash when presenting view controllers

 'NSRangeException', reason: 'Cannot remove an observer <UINSSceneViewController 0x600003558790> for the key path "view.window.screen.contentLayoutRect" from <UINSSceneViewController 0x600003558790> because it is not registered as an observer.'

 0   CoreFoundation                      0x00007fff3b20f183 __exceptionPreprocess + 250
 1   libobjc.A.dylib                     0x00007fff71719b64 objc_exception_throw + 48
 2   Foundation                          0x00007fff3d8ca2aa -[NSObject(NSKeyValueObserverRegistration) _removeObserver:forProperty:] + 578
 3   Foundation                          0x00007fff3d8ca01b -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:] + 74
 4   Foundation                          0x00007fff3d8e2898 -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:context:] + 190

mzaks

frame {
	items: [int]					# implicit input
	value: int						# implicit input
	min_index: int
	max_index: int
	mid_index: int
	<- found_index: int		# explicit output
}

# sel is selector

krzyzanowskim

//  Created by Marcin Krzyzanowski

import Foundation

public protocol JSONEncodable: Encodable { }

public extension JSONEncodable {
  func toJSON(using encoder: @autoclosure () -> JSONEncoder = JSONEncoder()) throws -> String {
    try String(decoding: encoder().encode(self), as: UTF8.self)
  }

shawwn

Twitter thread: https://twitter.com/theshawwn/status/1456925974919004165
Hacker News thread: https://news.ycombinator.com/item?id=29128998

November 6, 2021

How does JAX allocate memory on a TPU?

jnp.device_put(1) is deceptively simple to write in JAX. But on a TPU, what actually happens? How does a tensor containing the value 1 actually get onto a TPU?

Turns out, the answer is "C++", and a lot of it.

kylehowells

//
//  FreeSpaceViewController.swift
//  Free Space
//
//  Created by Kyle Howells on 04/05/2022.
//

import UIKit

class FreeSpaceViewController: UIViewController {