Objective-C Language
NSArray

NSArray इंस्टेंस बनाना

NSArray *array1 = [NSArray arrayWithObjects:@"one", @"two", @"three", nil];
NSArray *array2 = @[@"one", @"two", @"three"];

छंटनी कर रहे हैं

किसी सरणी को सॉर्ट करने के लिए सबसे अधिक लचीले तरीके सॉर्ट किए गए AArayUsingComparator: विधि के साथ हैं। यह एक ^ NSComparisonResult (id obj1, id obj2) ब्लॉक को स्वीकार करता है।

 Return Value            Description
 NSOrderedAscending      obj1 comes before obj2
 NSOrderedSame           obj1 and obj2 have no order
 NSOrderedDescending     obj1 comes after obj2

उदाहरण:

   NSArray *categoryArray = @[@"Apps", @"Music", @"Songs",
                     @"iTunes", @"Books", @"Videos"];
   
    NSArray *sortedArray = [categoryArray sortedArrayUsingComparator:
^NSComparisonResult(id obj1, id obj2) {
    if ([obj1 length] < [obj2 length]) {
        return NSOrderedAscending;
    } else if ([obj1 length] > [obj2 length]) {
        return NSOrderedDescending;
    } else {
        return NSOrderedSame;
    }
  }];

 NSLog(@"%@", sortedArray);

फ़िल्टर NSArray और NSMutableArray

NSMutableArray *array =
    [NSMutableArray arrayWithObjects:@"Ken", @"Tim", @"Chris", @"Steve",@"Charlie",@"Melissa", nil];

NSPredicate *bPredicate =
    [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'c'"];
NSArray *beginWithB =
    [array filteredArrayUsingPredicate:bPredicate];
// beginWith "C" contains { @"Chris", @"Charlie" }.

NSPredicate *sPredicate =
    [NSPredicate predicateWithFormat:@"SELF contains[c] 'a'"];
[array filterUsingPredicate:sPredicate];
// array now contains { @"Charlie", @"Melissa" }