arturgrigor

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

target '%TargetName%' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for %TargetName%
  # pod 'FBSDKCoreKit'
end

sjoerdvisscher

struct MinimalDecoder : Decoder {
  var codingPath = [CodingKey?]()
  var userInfo = [CodingUserInfoKey : Any]()
  
  public func container<Key>(keyedBy type: Key.Type) throws -> KeyedDecodingContainer<Key> {
    return KeyedDecodingContainer(MinimalKeyedDecodingContainer<Key>(decoder: self))
  }
  
  public func unkeyedContainer() throws -> UnkeyedDecodingContainer {
    return DecodingContainer(decoder: self)

mayoff

// For https://twitter.com/nicklockwood/status/819938181483233285

protocol Withable {
    init()
}

extension Withable {
    func with(_ body: (inout Self) -> ()) -> Self {
        var copy = self
        body(&copy)

steipete

# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

# (A similar approach works for older versions too, just change the version number after DeviceSupport)

modocache

 $ lldb -- ../build/Ninja-DebugAssert/swift-macosx-x86_64/bin/swiftc -dump-parse ~/GitHub/tmp/hello.swift
(lldb) target create "../build/Ninja-DebugAssert/swift-macosx-x86_64/bin/swiftc"
Current executable set to '../build/Ninja-DebugAssert/swift-macosx-x86_64/bin/swiftc' (x86_64).
(lldb) settings set -- target.run-args  "-dump-parse" "/Users/bgesiak/GitHub/tmp/hello.swift"
(lldb) process launch --stop-at-entry
Process 91478 stopped
* thread #1: tid = 0x1bd329, 0x00007fff5fc01000 dyld`_dyld_start, stop reason = signal SIGSTOP
    frame #0: 0x00007fff5fc01000 dyld`_dyld_start
dyld`_dyld_start:
->  0x7fff5fc01000 <+0>: popq   %rdi

steventroughtonsmith

void callEntryPointOfImage(char *path, int argc, char **argv)
{
	void *handle;
	int (*binary_main)(int binary_argc, char **binary_argv);
	char *error;
	int err = 0;
	
	printf("Loading %s…\n", path);
	
	handle = dlopen (path, RTLD_LAZY);

Catfish-Man

//Given this:
NSArray *objects = @[@1, @2, @3]

//These are equivalent in behavior
NSNumber *first = [objects objectAtIndex:0]
NSNumber *second = (NSNumber *)CFArrayGetValueAtIndex(objects, 0)

//But is the code that runs the same? Not so much… in the first one we do…
objc_msgSend(objects, <selector reference>, 0)
-> http://sealiesoftware.com/msg/x86-mavericks.html

felix-schwarz

#!/bin/bash

# This script downloads and builds the iOS, tvOS and Mac openSSL libraries with Bitcode enabled

# Credits:
# https://github.com/st3fan/ios-openssl
# https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh
# https://gist.github.com/foozmeat/5154962
# Peter Steinberger, PSPDFKit GmbH, @steipete.
# Felix Schwarz, IOSPIRIT GmbH, @felix_schwarz.

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."}];

carlfish

Response to a question on Twitter:

Either and Promises/Futures are useful and I’ll use them next time they’re appropriate. But outside Haskell does their monad-ness matter?

(All code below is written in some made-up Java-like syntax, and inevitably contains bugs/typos. I'm also saying "point/flatMap" instead of "return/bind" because that's my audience. Any correspondance with anything that either be programatically or mathematically useful is coincidental)

What is a monad? A refresher.

A monad is something that implements "point" and "flatMap" correctly.