n-b

/*/../bin/ls > /dev/null
COMPILED=${0%.*}
clang $0 -o $COMPILED -framework Foundation;
$COMPILED; rm $COMPILED; exit;
*/
 
 
#import <Foundation/Foundation.h>
  
int main(int argc, char *argv[])

steipete

// Taken from the commercial iOS PDF framework http://pspdfkit.com.
// Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
// Licensed under MIT (http://opensource.org/licenses/MIT)
//
// You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it.

// PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit.

#import <objc/runtime.h>
#import <objc/message.h>

andrewsardone

To form a parent-child relationship:

1. Send the -addChildViewController: message to the parent with the child as the parameter. This will send the -willMoveToParentViewController: message to the child with the parent as the parameter.
2. Add the child view controller's view as a subview to the parent view controller's view.
3. Send the -didMoveToParentViewController: message to the child with the parent as the parameter.

For example,

[parent addChildViewController:child];

andrewsardone

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if (object == self && context == self.kvoContext) {
        ((void (^)(void)) @{
            @"addresses": ^{ self.peep.address = [self dictionaryForArrayOfValues:self.addresses]; },
            @"emails": ^{ self.peep.email = [self dictionaryForArrayOfValues:self.emails]; },
        }[keyPath] ?: ^{})();
    }
    else if (object == self.peep && context == self.kvoContext) {
        ((void (^)(void)) @{

mwotton

typedef struct {
  int girlfriend;
} holder;

typedef struct {
  holder a;
} toplevel;

typedef struct {
  int this;

steipete

// Taken from http://PSPDFKit.com. This snippet is under public domain.
#define UIKitVersionNumber_iOS_7_0 0xB57
BOOL PSPDFIsUIKitFlatMode(void) {
    static BOOL isUIKitFlatMode = NO;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        // We get the modern UIKit if system is running >= iOS 7 and we were linked with >= SDK 7.
        if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0) {
            isUIKitFlatMode = (NSVersionOfLinkTimeLibrary("UIKit") >> 16) >= UIKitVersionNumber_iOS_7_0;
        }

jbenet

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

cobyism

Creating a bootable macOS USB installer

• First, plug in an 8GB (or bigger) USB drive, and use Disk Utility to erase it
• If you use the default settings, you should wind up with a blank drive at /Volumes/Untitled.

With that volume in place, and with the macOS installer sitting in /Applications/Install\ macOS\ [VERSION].app, run the following command in your terminal to create a bootable install media (for Sierra):

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction

jspahrsummers

Use cases

1. Turning an eager, pure computation into a lazy one: RACSequence, RACSignal
2. Side-effecting work that is safe to perform multiple times: RACSignal, RACCommand
3. Side-effecting work that is safe to perform multiple times serially, but not concurrently: RACCommand, RefCount()
   • RACScheduler would seem to apply here, but execution could become interleaved and thus not serial
4. Side-effecting work that should only be performed once, then memoized: RACMulticastConnection with a RACReplaySubject, RACSequence
5. Enabling/disabling a UI based on whether work can be performed: RACCommand, RACReplaySubject
   • Replaying is a Good Idea™ because this information may arrive before the UI is ready for it
6. Updating a UI with information about work in progress: RACCommand, RACSubject

steipete

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    // Horrible HACK for bug in UITextView where it won't scroll to the new line after pressing enter in the text view.
    // I feel dirty for having to write this. Buggy at least within iOS 7.0 - 7.1b1.
    if (PSPDFIsUIKitFlatMode() && [text isEqualToString:@"\n"] && range.location == textView.text.length) {
        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC));
        dispatch_after(popTime, dispatch_get_main_queue(), ^{
            CGPoint contentOffset = textView.contentOffset;
            CGFloat fontSize = textView.font.pointSize;
            if (textView.contentSize.height - fontSize > textView.bounds.size.height) {
                contentOffset.y += fontSize + 2.f; // add spacing