dduan

import SwiftUI

struct ChaoticPhoto: View {
    let image: Image
    let radius: CGFloat
    @Binding var activated: Bool
    @State var scale: CGFloat = 1
    var body: some View {
        image
            .resizable()

darrarski

import Combine
import CoreData

public final class FetchedResultsPublisher
    <ResultType>
    : Publisher
    where
    ResultType: NSFetchRequestResult
{
    

AliSoftware

/*:
 This is a concept re-implementation of the @Binding and @State property wrappers from SwiftUI

 The only purpose of this code is to implement those wrappers myself
   just to understand how they work internally and why they are needed,

 ⚠️ This is not supposed to be a reference implementation nor cover all
      subtleties of the real Binding and State types.
    The only purpose of this playground is to show how re-implementing
      them myself has helped me understand the whole thing better

chriseidhof

final class Loader: BindableObject {
    let didChange = PassthroughSubject<Data?, Never>()
    var task: URLSessionDataTask!
    var data: Data? = nil {
        didSet {
            didChange.send(data)
        }
    }
    
    init(_ url: URL) {

RuiAAPeres

/// `ObjectBinding` used as a way to create a `Binding` from a `BindableObject`. In this case the ViewModel
/// complies with `BindableObject` which is then translated into a `Binding` which is what `Toggle` is expecting
/// NOTE: Since it's a `DynamicViewProperty`, after its value is changed, the body will be updated.
class ViewModel: BindableObject {

   let didChange = PassthroughSubject<ViewModel, Never>()

   var isEnabled = false {
       didSet {
           didChange.send(self)

nadavrot

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

SheldonWangRJT

iOS Dynamic vs. Static Library / Framework

Find me on Github, Facebook, Youtube, etc by #iOSBySheldon.

Concept

Library and Framework are not same but close. Frameworks are just libraries with linking (binding). In other words, frameworks are just libraries that are bundled into targets. Therefore, their file extensions are different.

File Format

• Static Library - xxxx.a
• Dynamic Library - xxxx.dylib

k06a

#import <AVFoundation/AVFoundation.h>

@interface MLWAsyncAVPlayer : AVPlayer

@end

k06a

#import <JRSwizzle/JRSwizzle.h>

@implementation AVPlayerItem (MLWPerformance)

+ (void)load {
    [AVPlayerItem jr_swizzleMethod:NSSelectorFromString(@"_attachToFigPlayer") withMethod:@selector(mlw_attachToFigPlayer) error:nil];
}

- (void)mlw_attachToFigPlayer {
    static dispatch_queue_t queue = nil;

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?