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@steventroughtonsmith
steventroughtonsmith / main.m
Created March 24, 2016 08:08
Load Mach-O executable at runtime and execute its entry point
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);
/// An operator is given by a list of arities, where each element indicates the number of
/// variables bound by the operator at that position and the length of the list determines the
/// number of variables the operator accepts. The full generalization of arity is called
/// the operator's "valence".
///
/// For example, if I have a little calculator language with let-bindings, its operators
/// would look like this:
///
///
/// enum CalcOps : Operator {
#import <Foundation/Foundation.h>
@class CKRecordID;
@interface CKCPartialErrorItem : NSObject
@property (strong) NSError *error;
@property (strong) CKRecordID *recordID;
@end
@class CKRecord;
@mchambers
mchambers / serializer.swift
Created June 25, 2014 07:49
A simple, limited model-to-JSON serializer in Swift.
// Here we'll use Swift's IDE-supporting reflect()
// function to build a basic JSON serializer.
// Per the fine engineers at WWDC, Swift's reflection support
// exists purely to support the IDE and the Playground. But
// we can have some fun with it anyway. ;)
class SerializerBase {
}
@jczaplew
jczaplew / README.md
Last active June 6, 2021 05:41
Setting up a LaunchDaemon with pm2

Setting up a LaunchDaemon with pm2

If you have a Node.js app running on an OS X server, you probably:

  • Want it to start automatically when the system boots
  • Want to use something like pm2 or forever to monitor the status of the app, log errors, and make sure it stays up

While pm2 has the ability to generate startup scripts for use with Ubunutu, Centos, and systemd, it does not work with OS X. The best approach is to use launchd, an OS X-specific daemon manager that replaces cron. It uses XML-based files for configuration. This guide will walk you through the process. Note: "xyz" is used as a placeholder for the application name throughout this guide.

Instructions

@matthiasplappert
matthiasplappert / gist:9493050
Last active August 29, 2015 13:57
QuickLook Debugging for `UIView`
@interface UIView (MPAdditions)
@end
@implementation UIView (MPAdditions)
- (id)debugQuickLookObject {
if (self.bounds.size.width < 0.0f || self.bounds.size.height < 0.0f) {
return nil;
}
@steipete
steipete / Macros.h
Last active January 6, 2024 07:24
Declare on your main init that all other init methods should call. It's a nice additional semantic warning. Works with Xcode 5.1 and above. Not tested with earlier variants, but should just be ignored. A reference to this macro shortly appeared in https://developer.apple.com/library/ios/releasenotes/ObjectiveC/ModernizationObjC/AdoptingModernObj…
#ifndef NS_DESIGNATED_INITIALIZER
#if __has_attribute(objc_designated_initializer)
#define NS_DESIGNATED_INITIALIZER __attribute((objc_designated_initializer))
#else
#define NS_DESIGNATED_INITIALIZER
#endif
#endif
@steipete
steipete / PSPDFUIKitMainThreadGuard.m
Last active May 27, 2024 12:11
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
// 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>
/**
* Several macros simplifying use of weak references to self inside blocks
* which goal is to reduce risk of retain cycles.
*
* Example:
* @code
@interface Example : NSObject{
int _i;
}
@omz
omz / gist:1102091
Created July 24, 2011 01:40
Creating arbitrarily-colored icons from a black-with-alpha master image (iOS)
// Usage example:
// input image: http://f.cl.ly/items/3v0S3w2B3N0p3e0I082d/Image%202011.07.22%2011:29:25%20PM.png
//
// UIImage *buttonImage = [UIImage ipMaskedImageNamed:@"UIButtonBarAction.png" color:[UIColor redColor]];
// .h
@interface UIImage (IPImageUtils)
+ (UIImage *)ipMaskedImageNamed:(NSString *)name color:(UIColor *)color;
@end