steipete

static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
    NSCParameterAssert(fileURL);

    dispatch_queue_t shaQueue = dispatch_queue_create("com.pspdfkit.sha256-queue", DISPATCH_QUEUE_SERIAL);
    __block dispatch_io_t readChannel;

    void (^processIntError)(int intError) = ^(int intError) {
        if (intError != 0) {
            PSPDFLogWarning(@"Stream error: %d", intError);
            if (error) *error = [NSError errorWithDomain:@"SHA256Error" code:100 userInfo:@{NSLocalizedDescriptionKey: @"failed to open file for calculating SHA256."}];

steipete

static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
    NSCParameterAssert(fileURL);

    NSData *shaData;

    int fd = open(fileURL.path.UTF8String, O_RDONLY);
    if (fd < 0) {
        if (error) *error = [NSError pspdf_errorWithCode:PSPDFErrorCodeUnableToOpenPDF description:@"Failed to open file for calculating SHA256."];
        return nil;
    }

mattshepherd

//disable TOC button
window.HelpViewer.showTOCButton(false);

//enable TOC button
//If you call this on window load it will flash active for a brief second and then disable again.
//Call if after a delay of 250ms and is works fine
//Not sure what the second variable does yet, but passing false works fine
window.HelpViewer.showTOCButton( true, false, function() {
	 //do something to toggle TOC in your webpage
});

jspahrsummers

//
// DON'T do this, or else you risk a deadlock (e.g., by accidentally performing it in a different order somewhere)
//

dispatch_async(firstQueue, ^{
  dispatch_sync(secondQueue, ^{
    // code requiring both queues
  });
});

mxcl

#!/bin/bash
#
# Faster toolchain build: skips as much as possible.
#
# To use this toolchain from the command line:"
#     export TOOLCHAINS=$(whoami)
#
# we build to the same prefix every time (instead of building
# to a versioned prefix) because every time the prefix changes
# *everything* rebuilds.

mayoff

import Dispatch
import Foundation

var x = 7
let dd = withUnsafeBytes(of: &x, { DispatchData.init(bytes: $0) })
print(dd as? Data)                      // Case 1: nil
print(dd as? NSData)                    // Case 2: nil
print(dd as Any as? Data)               // Case 3: nil
print(dd as Any as? NSData)             // Case 4: .some
print(dd as Any as? NSData as Data?)    // Case 5: .some

douglashill

import UIKit

/// A wrapper view controller that makes the horizontal size class
/// be based on both the Dynamic Text size and the width available.
class AdaptiveTraitsContainer: UIViewController {
    let wrappedViewController: UIViewController

    init(wrappedViewController: UIViewController) {
        self.wrappedViewController = wrappedViewController
        super.init(nibName: nil, bundle: nil)

IanKeen

public typealias LosslessStringCodable = LosslessStringConvertible & Codable

@propertyWrapper
public struct LosslessCodable<Value: LosslessStringCodable>: Codable {
    private let type: LosslessStringCodable.Type

    public var wrappedValue: Value

    public init(wrappedValue: Value) {
        self.wrappedValue = wrappedValue