douglashill

// TODO: greater than, less than, multipliers, constants

import Foundation

let input = "[container.trailingAnchor constraintEqualToAnchor:childView.trailingAnchor]"

func attribute(fromAnchor anchor: String) -> String {
    if let range = anchor.rangeOfString("Anchor") {
        var s = anchor.substringToIndex(range.startIndex)
        let firstChar = s.removeAtIndex(s.startIndex)

douglashill

# coding: utf-8

import os
import sys

# Make source code files in a directory all begin with consistent preamble, which is:
# //
# // <filename>
#
# This code is very rough and could be better in lots of ways.

douglashill

#!/usr/bin/python
#coding: utf-8

import json
import subprocess

def delete_all_simulators():
	devices_json = subprocess.check_output(["xcrun", "simctl", "list", "--json", "devices"])
	devices_by_runtime = json.loads(devices_json)["devices"]
	for runtime, devices in devices_by_runtime.iteritems():

douglashill

@implementation UINavigationItem (DHDescription)

- (NSString *)description {
	return [self dictionaryWithValuesForKeys:@[@"title", @"titleView", @"prompt", @"hidesBackButton", @"backBarButtonItem", @"leftItemsSupplementBackButton", @"leftBarButtonItems", @"rightBarButtonItems"]].description;
}

@end

douglashill

// This is more hacky than it should be!
- (UIModalPresentationStyle)pspdf_currentPresentationStyle {
    UIViewController *vc = self.presentedViewController.presentingViewController;
    
    if ([self respondsToSelector:@selector(adaptivePresentationStyleForTraitCollection:)]) {
        UIModalPresentationStyle const style = [self adaptivePresentationStyleForTraitCollection:vc.traitCollection];
        return (style == UIModalPresentationNone) ? self.presentationStyle : style;
    }

    // Before iOS 8.3 we have to fall back on assuming adaptivity is only possible for horizontally compact environments.

douglashill

// It isn’t immediately obvious how to enable secure decoding with NSKeyedUnarchiver.
// NSKeyedUnarchiver has a read-write requiresSecureCoding property, but we normally use:

id decodedObject = [NSKeyedUnarchiver unarchiveObjectWithData:archive];

// so never see an instance to be able to set this property.
// However, it is quite simple. The critical part is that we use the
// normal decodeObject… methods, passing the key of the root object.

NSData *archive;

douglashill

@import Foundation;

@interface ContravariantCollection<__contravariant ObjectType> : NSObject
@end

@implementation ContravariantCollection
@end

void stringSetThing(NSSet<NSString *> *set) {
}

douglashill

---
AccessModifierOffset: -2
AlignAfterOpenBracket: true
AlignEscapedNewlinesLeft: false
AlignOperands: true
AlignTrailingComments: true
AllowAllParametersOfDeclarationOnNextLine: true
AllowShortBlocksOnASingleLine: false
AllowShortCaseLabelsOnASingleLine: true
AllowShortFunctionsOnASingleLine: All

douglashill

// xcrun -sdk macosx clang non-square-problem.c -framework Accelerate  && ./a.out

// Douglas Hill, April 2015
// This demonstrates a problem discussed in Apple bug report 20428946.
// Using LinearAlgebra’s la_solve with a non-square matrix results in an error instead of the expected output.

#import <Accelerate/Accelerate.h>

static void solveUsingLinearAlgebra(float *Adata, float *bdata, int numObservations);
static void solveUsingLAPACK(float *Adata, float *bdata, int numObservations);

douglashill

@implementation NSFileManager (DHRemoveFile)

- (BOOL)dh_removeItemIfExistsAtURL:(NSURL *)URL error:(NSError **)out_error
{
	NSError *error; // We need this in case out_error is NULL.
	
	if ([self removeItemAtURL:URL error:&error]) {
		return YES;
	}