OliverLetterer

typedef struct CAColorMatrix {
    float m11, m12, m13, m14, m15;
    float m21, m22, m23, m24, m25;
    float m31, m32, m33, m34, m35;
    float m41, m42, m43, m44, m45;
} CAColorMatrix;

@interface CAFilter : NSObject

@property(copy) NSString *name;

airspeedswift

private class MyArrayBuffer<Element>: ManagedBuffer<Int,Element> {
    
    func clone() -> MyArrayBuffer<Element> {
        return self.withUnsafeMutablePointerToElements { elements -> MyArrayBuffer<Element> in
            return MyArrayBuffer<Element>.create(self.allocatedElementCount) { newBuf in
                newBuf.withUnsafeMutablePointerToElements { newElems->Void in
                    newElems.initializeFrom(elements, count: self.value)
                }
                return self.value

an0

Call Chain:

CALayer.display() --- if delegate implements displayLayer ---> CALayerDelegate.displayLayer(:)
|                                                               /
|                                                              /
else                                                          /
|                                                            /
|                                                           |
v                                                           v
CALayer.drawInContext(:) ---> CALayerDelegate.drawLayer(:, inContext:) ---> UIView.drawRect(:)

JoaquimLey

Step 1 - Create a New SSH Key

We need to generate a unique SSH key for our second GitHub account.

ssh-keygen -t rsa -C "your-email-address"

Be careful that you don't over-write your existing key for your personal account. Instead, when prompted, save the file as id_rsa_COMPANY. In my case, I've saved the file to ~/.ssh/id_rsa_work.

Step 2 - Attach the New Key

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

rnapier

import Foundation

class Disposable {
    let dispose: () -> Void
    init(dispose: @escaping () -> Void) { self.dispose = dispose }
    deinit {
        dispose()
    }
}

PramodJoshi

func isVPNConnected() -> Bool {
    let cfDict = CFNetworkCopySystemProxySettings()
    let nsDict = cfDict!.takeRetainedValue() as NSDictionary
    let keys = nsDict["__SCOPED__"] as! NSDictionary

    for key: String in keys.allKeys as! [String] {
        if (key == "tap" || key == "tun" || key == "ppp" || key == "ipsec" || key == "ipsec0") {
            return true
        }
    }

sebsto

# YouTube (english) : https://www.youtube.com/watch?v=FtU2_bBfSgM
# YouTube (french) : https://www.youtube.com/watch?v=VjnaVBnERDU

#
# On your laptop, connect to the Mac instance with SSH (similar to Linux instances)
#
ssh -i <your private key.pem> ec2-user@<your public ip address>

#
# On the Mac

b3ll

@propertyWrapper
public final class LayoutInvalidating<Value> where Value: Equatable {

    public static subscript<EnclosingSelf>(
      _enclosingInstance observed: EnclosingSelf,
      wrapped wrappedKeyPath: ReferenceWritableKeyPath<EnclosingSelf, Value>,
      storage storageKeyPath: ReferenceWritableKeyPath<EnclosingSelf, LayoutInvalidating>
    ) -> Value where EnclosingSelf: UIView {
      get {
        return observed[keyPath: storageKeyPath].stored

mike011

• 101_hd.mov
• 101_sd.mov
• 102_hd_platforms_state_of_the_union.mov
• 102_sd_platforms_state_of_the_union.mov
• 102_platforms_state_of_the_union.pdf
• 103_hd_apple_design_awards.mov
• 103_sd_apple_design_awards.mov
• [ 201_hd_advanced_