Use index instead of key for an array. NSDictionary dictionary = (NSDictionary *)dataArray[0]; if ([(NSNumber *)[dictionary objectForKey:@"success"] boolValue]) { // ... }

In order to deep copy the content of the array [[NSMutableArray alloc] initWithArray:srcArray copyItems:YES]; will send copyWithZone: to every object inside the collection. If they don't respond to this selector, you'll get a crash. Have your CustomParent class to conform to the NSCopying protocol and you're done. Here's some extra info on how do achieve it: Implementing NSCopying

Strongly typed enums mean that you can only, implicitly, compare and assign values in the same enum class. The solution is to use a non-strongly typed enum example: enum test : bool { yes, no }; bool x = test::yes; // ok Or as suggested by Tom Knapen: explicitly cast the enum enum class test : bool { yes, no }; bool x = static_cast<bool>(test::yes); // ok

There was table which i was reloading and error was coming. The tableView reloadData command is also not thread-safe. dispatch_async(dispatch_get_main_queue(), ^{ [self.tableView reloadData]; });

Put this at the top of your source file. If it works after that, then Borland c++ simply doesn't support bool type. If not, I have no clue why you get Syntax error. typdef byte bool; #define true 1 #define false 0

I am not aware of anyway besides visiting each element, like: NSMutableArray *mutableArray; // your array of objects for (int i = 0; i < [mutableArray count]; i++) mutableArray[i] = [[NSString alloc] initWithData:mutableArray[i] encoding:NSUTF8StringEncoding];

Facebook developer site they are suggesting, you have to start the section when applicationDidFinishLaunching itself. So you need to call openSessionWithAllowLoginUI: NO (no need to provide the login ui) from there. Dont worry if the user is not logged in this method wont do anything. In other case if the user is already authorized it will start a session for the user and change the state also(you will get notified) so you can set the login button accordingly. Finally wether this method failed to start a session allow the user to login through login button by calling openSessionWithAllowLoginUI: YES

In easy words. Boolean is a Structure. this boolean expose ToString() method which represent a human readable text for the users. So if you write some thing like. bool b = false; b.ToString(); the output will be the "False" insteed of 0. the "False" is readable by human and easyly being captured. Also some where you may want to parse a text value to a boolean value. so these also can be represented as boolean values. for example. we use Boolean.TryParse("false" ,out mybool) the false value is being set by the Tryparse method as this finds that we can read values from strings tool.

There's no need for any explicit conversion: BOOL x = some_value; bool b = x; The implicit conversion of a numeric type to bool yields false for a value of 0, and true for any non-zero value. Incidentally, you've told us how <windows.h> defines FALSE and TRUE. How does it define BOOL? (From your comment, it's typedef int BOOL;) But some compilers may warn about this implicit conversion, even though it's perfectly valid code. Compilers are free to warn about anything they like, including the ugly font you used to write your code. g++, for example, doesn't complain about the conversion, even with: g++ -std=c++11 -pedantic -Wall -Wextra ... But according to this online Visual C++ compiler, VC++ does produce a warning: warning C4800: 'BOOL' : forcing value to bool 'true' or 'fal

There are three values of type Bool: True, False and bottom (expressions for which the evaluation doesn't finish or expressions for which the evaluation turns into errors). Then, there are an exponential number of functions from A to B. More exactly |B| ^ |A|. Thus, there are 3^3 = 27 functions of type Bool -> Bool. Now, for the second part of the question: function starting from bottom can be only 2: the one constantly returning True and the one constantly returning False. Then you have to add the number of functions from {True, False} to {True, False, bottom} which is 3^2. So, in total you'll have 9+2=11 functions. Edit: Here are the 11 possible functions: B is bottom, T is True, F is False. The last row represents the const True and the const False functions while the first th

Why not pass it in public Cv3AddressDao ReadSingle<TEntity>(Expression<Func<TEntity, bool>> predicate) { // ... } ... var dao = new MyDao(); var addr = dao.ReadSingle<MyEntity>(x => x.SiteId == 1);

As someone's comments state, the missing are headers which I missed removing the references (they exist here) to, but I had removed the usage of. However, the actual problem above is with C++ basic object conversion rules. In case soemone else runs into this: c provides a direct conversion from a pointer type to a boolean. c++ adds a std::string class. That class provides a constructor from const char*. Direct conversions are simpler than class constructors, thus that conversion is preferred when either can be used. Because it is simpler, it is also not considered ambiguous over which conversion to use. Thus, though char* to string is what was intended, the compiler did pointer to boolean, causing the output to be a boolean. The information was given by VeXocide on the freenode ##

The problem is that you shouldn't be using removeAllObjects as it just cleans the array out (deleting the work you just did). Instead, you should be creating a new array (tempImageArray = [NSMutableArray array];).

T instance = GetSomeT(); Predicate<T> MyPredicate = x => comparer(x, instance); TRepository.GetAll().Where(MyPredicate); Taking in account the comment gave below, here is how you make a Expression<Func<T, bool>> T instance = GetSomeT(); Expression<Func<T, bool>> Exp = x => comparer(x, instance); TRepository.GetAll().Where(Exp); That's exactly the same, just with different var type. In short you can just: TRepository.GetAll().Where(x => comparer(x, instance));

Why don't you just change your method to be: T GetSingle(IRepository<T> repository, Expression<Func<TSource, Boolean>> predicate) { return repository.GetAll().Single(predicate); } so instead of this: GetSingle(myRepository, (a,b) => a.Id == b.Id, myEntity); you should be able to do this: GetSingle(myRepository, a => a.Id == myEntity.Id);

This is because you keep re-creating your "scoreTally" array so it's constantly being reset to an array with a single NSNumber object. You need to create your "scoreTally" array once and then add additional objects to it as scores keep getting added. So I'd recommend moving your "scoreTally" creation somewhere else, for example the "viewDidLoad" method of your view controller (making sure to keep "scoreTally" around via an ivar or a property).

You can get maximum and minimum number as below code. It may help you NSNumber * max = [array2 valueForKeyPath:@"@max.intValue"]; NSNumber * min = [array2 valueForKeyPath:@"@min.intValue"]; NSUInteger numberIndex1 = [array indexOfObject:min]; NSUInteger numberIndex2 = [array indexOfObject:max]; NSLog(@"Max Value = %d and index = %d",[max intValue],numberIndex1); NSLog(@"Min Value = %d and index = %d",[min intValue],numberIndex2);

Jason, I am not pretty sure about what your requirements are but as per I understand predicate is answer for your question, which are very helpful for searching. Block predicates have made it very easy to use. NSArray *allFbIds = [self.myPersonArray valueForKeyPath:@"UserDef2"]; NSPredicate *predicate = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) { NSDictionary *data = (NSDictionary *)evaluatedObject; NSString *fbid = [data objectForKey:@"id"]; return [allFbIds containsObject:fbid]; }]; NSArray *filetr = [array filteredArrayUsingPredicate:predicate]; If any of fbID will be available in property UserDef2 in KP_PERSON object of myPersonArray that will be in the filtered in the array. I think this might solve your problem.

Try something like this: - (NSMutableArray*) getFairInfoArray: (NSString*) FairIdForThisMethod From: (NSMutableArray*) exibitorsForThisMethod { NSMutableArray* exibitorsWithFairId = [[NSMutableArray alloc] init]; for (ExibitorInfo* currentExibitors1 in exibitorsForThisMethod) { if ([currentExibitors1.FairId isEqualToString: FairIdForThisMethod]) { ExibitorInfo* currentExibitors2 = [[ExibitorInfo alloc] init]; [currentExibitors2 setExibitorName:currentExibitors1.exibitorName]; [currentExibitors2 setStallLocation:currentExibitors1.stallLocation]; [currentExibitors2 setExibitorCellBackGround:currentExibitors1.exibitorCellBackGround]; [currentExibitors2 setCompanyLogoURL:currentExibitors1.companyLogoURL];

It is probably because you are using backlist.count-1 as your index instead of using i. try this: while (i!=backlist.count) { NSLog(@"%@ %@",[[backlist objectAtIndex:i] objectForKey:@"id" ],[[backlist objectAtIndex:i] objectForKey:@"name" ]);i++; }

There are good clues in your log output. There are multiple instances of the view controller (see the different values for 'self'?). They each have their own array. See this code... -(IBAction)newFileMenubar:(id)sender{ [newFileWindowControllerArray addObject:[[NewFileWindowController alloc]initWithWindowNibName:@"NewFileWindowController"]]; When you press the button associated with that action, your app builds another view controller and places it in the array. That view controller gets the awake from nib message and allocates another array, and so on. To confirm this, change the code as follows: -(IBAction)newFileMenubar:(id)sender{ [newFileWindowControllerArray addObject:@"Hello world"]; // and comment this out, for now: // [[newFileWindowControllerArra

The picker cannot show a random object, but a only a string (in its base configuration). Make sure you add the name or some other string attribute of your Products class to the array, (or instruct your picker's datasource to use the right field). You should really change some names of your classes and variables. If one instance of your class represents a product, the class name should be Product not Products. Also, to use a property name like all is really not intuitive - try to think of something more generic and descriptive. Also, in your for loop you set i to 0, use it once and then increase it at the end of the loop. Why? Your index set code can also be eliminated.

If it's a copy then no. If you've added it as a reference then yes. It's just a pointer to an object so any changes to your object will apply to the object reference in the array. Don't be confused by the NSMutable part of the array. The same thing happens with a normal NSArray: if you change the object, then the array will have a reference to the changed object. The mutable part only applies to the array, not the objects in the array.

You should read : https://developer.apple.com/library/mac/#documentation/cocoa/reference/foundation/Protocols/NSCoding_Protocol/Reference/Reference.html You need to implement initWithCoder and encodeWithCoder. To save to file, just do : [NSKeyedArchiver archiveRootObject:myArray toFile:@"someFile"]; to load it: NSMutableArray* myArray = [NSKeyedUnarchiver unarchiveObjectWithFile:@"someFile"];

Why are you checking tableView == pdfListnameTable ? That should be tableView isEqual:self. pdfListnameTable. Not sure that is relevant here, but if you have more than one tableView - i'd guess that you aren't switching to it as there seems to be a lack of an else statement for that.

Your FS value is a string that includes the newline character from the file still, so test for a string value: if FS == '0 ': or strip the newline:     if FS.strip() == '0': or turn FS into a float first: if float(FS) == 0: or strip line while splitting: line = line.strip().split(';') Further tips: Just loop over lines directly; don't use range(): for line in lines: line = line.strip() # do something with `line` Even if you still need an index as well, you use enumerate() to generate the index: for i, line in enumerate(lines): line = line.strip() # do something with `line` and `i`. You can use the csv module to handle splitting data files into rows: import csv with open(somefile, 'rb') as inputfile: reader = csv.reader(inputfile, delimiter=';')

toggleChrome: sets the isChromeHidden_ variable, it does not toggle it. To toggle you would write: - (void)toggleChrome { isChromeHidden_ = !isChromeHidden_; //Find chrome value NSLog(isChromeHidden_ ? @"YES" : @"NO"); } !isChromeHidden_ is the opposite value of isChromeHidden_.

Do I understand correctly that bool to int cast should cast true to 1? Yes. GCC 4.8.1 gives strange result for this code: That's because your program has undefined behavior, since your array is not initialized. Try, for instance, this: array<bool, 3> bb = { true, false, true }; And you will see a consistent output. Here is a live example.

Not sure what you mean But you could do something like this bool myBool = false; this.Invoke(new MethodInvoker(() => myBool = getBool())); return myBool; If am wrong pls make me clear

something like this ? @interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate,UIAccelerometerDelegate> { UIAccelerometer *accelerometer; float xoff; float yoff; float xvelocity; float yvelocity; float xaccel; float yaccel; BOOL FrontCamera; BOOL haveImage; UIImageView *capturedImage; }

You should raise an Exception when something not expected happens. In your case if a user is logging in it is not unexpected that the procedure fails, he/she might have inserted a wrong password or used a wrong username password combination. It would be exceptional if, for example, the database is not found. Exceptions should not be used as flow control structures, but to handle those edge, unexpected cases that could happen outside the normal flow of an application. Be sure though to return a proper response, in JSON it could be something like { "result": "failure", "message": "username and/or password not matching to any user" } because a simple false is not informative at all.

The answer will be short: no, the C++ syntax does not allow such structure. You have to use: something = something || something_else; However.... if your function returns bool on success (as in, true on success)... Why don't you just use the following? someOk = funcReturningBoolOnSuccess(i); Will it not return false on failure anyway? Seems illogical. Why don't you just do: bool someOk=false; for(int i=0; i<10; i++){ if (funcReturningBoolOnSuccess(i)) { someOk = true; break; } } A lot more efficient :)

setBool:forKey: expects a BOOL. Try using YES or NO instead of true or false (which is type bool, lowercase). Also you should access it with boolForKey instead of objectForKey. Your logic test will always be YES if you've ever set the object in NSUserDefaults since you're effectively testing if the key exists (i.e. not nil), not whether it is actually set to YES/NO. In other words, change: if ([defaults objectForKey:@"stateForSoundSwitch"]) { to this: if ([defaults boolForKey:@"stateForSoundSwitch"] == YES) {

why is this possible?! Undefined behaviour is just that - undefined. Anything at all could happen. if enough memory for 137 is allocated, then why the hell test++; results in 1? The language specification defines that behaviour.

Because input contains north so first if is executed and not searching for else if, try to inverse if's and put case5 as first if :) if (case5) CaseId = 5; else if (case2) CaseId = 2; else if (case3) CaseId = 3; else if (case4) CaseId = 4; else if (case1) CaseId = 1;

Have you even created your _theNewSource array? It seems like you haven't done the following: _theNewSource = [[NSMutableArray alloc] init]; Make sure you are creating your instance before trying to use it.

sortedArrayUsingDescriptors does not sort the array in place. It returns a newly-sorted array. sortUsingDescriptors does an in-place sort.

If the format is json (as your tags suggest) the easiest way is to use NSJSONSerialization Using + (id)JSONObjectWithData:(NSData *)data options:(NSJSONReadingOptions)opt error:(NSError **)error Will get you a foundation class object returned (NSArray, NSDictionary, depending on the json data)

Looking at your updated question, you're setting up that array inside the scope that starts with // Custom initialization. But what you don't notice is that viewDidLoad is actually called on this line: self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; That means your array is still nil inside viewDidLoad, and thus DoUpdateLabel I would recommend instead initializing that array inside -viewDidLoad instead, and you'll see the results you're looking for.

Try using this method on NSArray. Something like this: return [personArray[[personArray indexOfObjectPassingTest:^ (id obj, NSUInteger index, BOOL stop) { return [lastName isEqualToString:[obj lastName]]; }]] phoneNumber]; You get the idea.