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[Error] TypeError: 'undefined' is not an object (evaluating 'e[0]')
	n (337f27a6c3093ed3390715e341936bf3aeca7631.js, line 11)
	replace (337f27a6c3093ed3390715e341936bf3aeca7631.js, line 12)
	i (337f27a6c3093ed3390715e341936bf3aeca7631.js, line 12)

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+ (instancetype)newTempMainContext
{
  NSManagedObjectContext *parentContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
  [parentContext performBlockAndWait:^{
    [parentContext setPersistentStoreCoordinator:[NSPersistentStoreCoordinator defaultStoreCoordinator]];
  }];

  NSManagedObjectContext *tempContext = [NSManagedObjectContext newMainQueueContext];
  [tempContext setParentContext:parentContext];
  return tempContext;

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@implementation UIWindow (FirstResponder)

- (BOOL)canBecomeFirstResponder {
  return YES;
}

@end

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- (void)printOut {
  
  NSArray *days = @[@"Sunday", @"Monday", @"Tuesday", @"Wednesday", @"Thursday", @"Friday", @"Saturday"];
  
  for( NSString *day in days ) {
    NSLog(@"day = %@",day);
  }
  
}