krzysztofzablocki

typedef NS_ENUM(NSInteger, kErrorCode) {
  kErrorCodeInternal = 431432,
};
 
//! generate error and log it.
extern NSError *pixle_NSErrorMake(NSString *message, NSUInteger code, NSDictionary *aUserInfo, SEL selector);
 
#define AssertTrueOrReturnBlock(condition, block) do{ NSAssert((condition), @"Invalid condition not satisfying: %s", #condition);\
    if(!(condition)) { block(pixle_NSErrorMake([NSString stringWithFormat:@"Invalid condition not satisfying: %s", #condition], kErrorCodeInternal, nil, _cmd)); return;} }while(0)
 

d0k

-W
  -Wextra
    -Wmissing-field-initializers
    -Wignored-qualifiers
    -Winitializer-overrides
    -Wsemicolon-before-method-body
    -Wmissing-method-return-type
    -Wsign-compare
    -Wunused-parameter
-W#pragma-messages

fphilipe

// This code demonstrates -hash collision on NSString. Two strings have the same
// hash when the first, center, and last 32 chars are identical. The other chars
// don't matter at all.
//
// I had to find this out the hard way when loading images from cache while
// using the url string hash as the cache key. Unfortunately the urls were all
// gravatar urls, thus first 32 chars were identical. Further, all urls also had
// a fallback image url appended as query which covered the 32
// center and end chars. The varying part was between the start and center parts
// and thus the hash was identical for all urls.