iamleeg

// hey, we've all got a coding interview to crack, right?

#import <Foundation/Foundation.h>

@interface FZBZSparseArray : NSArray
- initWithCount:(NSUInteger)count placeholder:placeholder overrides:overrides;
@end

@interface FZBZWrappedArray : NSArray
- initWrappingArray:underlyingArray;

iamleeg

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface ContractEnforcer<T> : NSProxy

- (T)initWithTarget:(T)target;

+ (T)enforcerWithTarget:(T)target;

iamleeg

#!/usr/bin/perl -w

use strict;
use Foundation;

my $plist = NSDictionary->dictionaryWithContentsOfFile_("/Applications/TextEdit.app/Contents/Info.plist");
print $plist->description()->UTF8String();

iamleeg

import Cocoa

typealias Selector = String

enum IMP {
  case accessor((Selector->IMP, Selector)->((Selector)->IMP)?)
  case asInteger((Selector->IMP, Selector)->Int?)
  case methodMissing((Selector->IMP, Selector)->((Selector)->IMP)?)
  case mutator((Selector->IMP, Selector, Selector->IMP)->Void)
  case description((Selector->IMP, Selector)->String?)

iamleeg

#import <Foundation/Foundation.h>

@interface A : NSObject
- (void)doThingWithObject:(id)o completion:(void(^)(void))completionHandler;
@end

@implementation A
- (void)doThingWithObject:(id)o completion:(void(^)(void))completionHandler
{
  NSLog(@"object: %@", o);

iamleeg

#import <Foundation/Foundation.h>

@interface A : NSObject
- (void)doThingWithObject:(id)o completion:(void(^)(void))completionHandler;
@end

@implementation A
- (void)doThingWithObject:(id)o completion:(void(^)(void))completionHandler
{
	NSLog(@"object: %@", o);

iamleeg

#import <UIKit/UIKit.h>

UIColor * operator"" _c(unsigned long long color)
{
    unsigned long long redComponent = (color & 0xff0000 >> 16);
    unsigned long long greenComponent = (color & 0x00ff00) >> 8;
    unsigned long long blueComponent = color & 0xff;
    float red = redComponent / 255.0;
    float green = greenComponent / 255.0;
    float blue = blueComponent / 255.0;

iamleeg

#import <Foundation/Foundation.h>
#import <dispatch/dispatch.h>
#import <objc/runtime.h>

void printMethodList(Class cls, const char *prefix)
{
	const char *className = class_getName(cls);
	unsigned int countOfMethods;
	Method *methodList = class_copyMethodList(cls, &countOfMethods);
	for(unsigned int i = 0; i < countOfMethods; i++)

iamleeg

#import <Foundation/Foundation.h>

typedef NS_ENUM(int, GJLRangeDirection) {
    GJLRangeDirectionPositive,
    GJLRangeDirectionNegative,
};

@interface GJLRange : NSEnumerator

+ (instancetype)rangeWithStart: (NSNumber *)start end: (NSNumber *)end step: (NSNumber *)step;

iamleeg

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

@interface A : NSObject
- (void)createPrivateSubclass;
@end

int main(int argc, char *argv[])
{
  @autoreleasepool