nsmutablearray

I want to remove duplicates from nsmutablearray. Array Structure :- ( { "act_end_date" = ""; "act_entry_date" = "13/11/2014"; "act_recurrrance_type" = Daily; "act_start_date" = "2014-11-13"; "row_id" = 0; "act_id" = 2; } { "act_end_date" = ""; "act_entry_date" = "13/11/2014"; "act_recurrrance_type" = Daily; "act_start_date" = "2014-11-13"; "row_id" = 1; "act_id" = 2; } { "act_end_date" = ""; "act_entry_date" = "16/11/2014"; "act_recurrrance_type" = Daily1; "act_start_date" = "2014-11-15"; "row_id" = 2; "act_id" = 3; } ) What I want is to check where array contain any dictionary which have same

I have an NSMutableArray with 3 UIButtons and Second NSMutableArray with 50 UIButtons. I want to take these 3 UIButtons Titles to Assign it Character by Character to each UIButton of SecondArray.but Each of these 50 UIButtons of Second Array already have single Character.My Basics purpose is that first of all i want to check the length of each uibutton title of my first Array,then assign it to index by index to UIButton in Second Array.(For Exp if my first Button have titles "stack",second "over" and Third "flow" no i want to Assign UIButtons of index 0-5 ,13-16,35-38 in Second Array) .My

I have an NSMutableArray containing the coordinates and sizes of multiple CGRects. I want to store this into the sqlite. Is it possible to store the whole array? Or should I just store the CGRects manually in the database? UPDATE: This one is the data I retrieved from the database: 62706c69 73743030 d4010203 04050817 18542474 6f705824 6f626a65 63747358 24766572 73696f6e 59246172 63686976 6572d106 0754726f 6f748001 a3090a0f 55246e75 6c6cd20b 0c0d0e5a 4e532e6f 626a6563 74735624 636c6173 73a08002 d2101112 16582463 6c617373 65735a24 636c6173 736e616d 65a31314 155e4e53 4d757461 626c6541 72726179

一、基本概念 NSNotification 和 NSNotificationCenter 是使用 观察者模式 来实现的用于跨层传递消息。 NSNotificationCenter采用 单例模式。 二、基本实现 通知实现由三个类组成：NSNotificationCenter、NSNotification、NSObserverModel,对应关系和接口设计： NSNotificationCenter是注册中心，发通知时，发送的是一个NSNotification对象。 NSNotification里面包含发通知需要传递的内容： name（通知的字符串）， object（发送通知的对象）， userInfo（需要传递的参数）， NSObserverModel是注册通知时需要保持的参数，包括： observer（观察者对象）， selector（执行的方法）， notificationName（通知名字）， object（携带参数）， operationQueue（队列）， block（回调）， 三：原理图： 四：注意点： 1、每次调用addObserver时，都会在通知中心重新注册一次，即使是同一对象，监听同一个消息，而不是去覆盖原来的监听。这样，当通知中心转发某一消息时，如果同一对象多次注册了这个通知的观察者，则会收到多个通知。 2、observer 观察者（不能为nil

Possible Duplicate: iphone - nsarray/nsmutablearray - re-arrange in random order I have an NSMutableArray that contains 20 objects. Is there any way that I could randomize their order like when you shuffle a deck. (By order I mean their index in the array) Like if I had an array that contained: apple orange pear banana How could I randomize the order so that I could get something like: orange apple banana pear Here's some sample code: Iterates through the array, and randomly switches an object's position with another. for (int x = 0; x < [array count]; x++) { int randInt = (arc4random() % (

Because of cocoa design patterns, the name of the instance method count in NSMutableArray is ambiguous; it could either return a saved variable count , or it could count the items in the array each time it's called, and return that (cocoa dictates that a method that simply returns the value of a variable foo be foo , not getFoo ). Does Objective C's NSMutableArray actually count the items every time its count method is called, or does it return the value of a pre-calculated variable? If this were Java, I'd look at the source code, but I can't find the source code for NSMutableArray . I looked

Currently I'm trying to find a compact way to average a matrix . The obvious solution is to sum the matrix, then divide by the number of elements. I have, however, come across a method on the apple developer website that claims this can be done in a simpler way using valueForKeyPath. This is linked here: http://developer.apple.com/library/ios/#documentation/cocoa/conceptual/KeyValueCoding/Articles/CollectionOperators.html Here is the example I'm currently working on to try and get it to work: -(void)arrayAverager { NSMutableArray *myArray = [NSMutableArray arrayWithCapacity:25]; [myArray

What is the differece between: [[NSMutableArray alloc] init] and [NSMutableArray array] Aakil Ladhani Here in [NSMutableArray array] you don't have to release array it will be released automatically. & if you will write [NSMutableArray alloc] init] you will have to release array so [[NSMutableArray array] will be equivalent to [[[NSArray alloc] init] autorelease]; The first remains in memory until you release it, the second lasts until the end of the run loop iteration. Ravi NSMutableArray no need to release memory and [NSMutableArray alloc] init] u must be release it. when ARC does work, you