NSArray and NSMutableArray are Objective-Cs general array types. It represents an ordered collection of objects, and it provides a high-level interface for sorting and manipulating lists of data.

NSArray are immutable type where NSMutableArray is mutable type, in short we can say NSMutableArray can be modified(add or remove) but NSArray can't be.

Array Initialization

NSArray *carManufacturers = [NSArray arrayWithObjects:@"BMW", @"Ford", @"Jaguar", @"AstonMartin", nil];

NSMutableArray *cars = [NSMutableArray arrayWithObjects: @"Ford", @"Jaguar", @"AstonMartin",@"BMW", nil];

Sorting NSArray

    NSArray *sortedArrays = [carManufacturers 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(@"%@", sortedMakes);

NSArray *carManufacturers = [NSArray arrayWithObjects:@"BMW",
                    @"Ford", @"Jaguar", @"AstonMartin", nil];
NSArray *bikeManufacturers = @[@"Honda", @"Yamaha", @"SUZUKI", @"Harley"];

NSArray *allManufacturers = [carManufacturers bikeManufacturers];
NSLog(@"%@", allManufacturers);

Array to String Conversion

NSArray *carManufacturers = [NSArray arrayWithObjects:@"BMW",
                    @"Ford", @"Jaguar", @"AstonMartin", nil];
NSLog(@"%@", [carManufacturers componentsJoinedByString:@", "]);

SubDivide a NSArray

NSArray *topCars = [NSArray arrayWithObjects:@"BMW",
                    @"Audi", @"Jaguar", @"AstonMartin", nil];
NSArray *allCars = @[@"Mercedes-Benz", @"Porsche",
                         @"Opel", @"Volkswagen", @"Ford"];

NSArray *lastTwo = [topCars subarrayWithRange:NSMakeRange(4, 2)];
NSLog(@"%@", lastTwo);

NSMutableArray Add/Remove

NSMutableArray *cars = [NSMutableArray arrayWithObjects:
                              @"Ford", @"Jaguar", @"AstonMartin",@"BMW", nil];

[cars addObject:@"BMW F25"];
NSLog(@"%@", cars);       // BMW F25 added to end
[cars removeLastObject];
NSLog(@"%@", cars);       // BMW F25 removed from end

Add at some define or arbitrary location

// Add BMW F25 to front
[cars insertObject:@"BMW F25" atIndex:0];
// Remove BMW F25 from front
[cars removeObjectAtIndex:0];
// Remove Audi Quattro
[cars removeObject:@"Audi Quattro"];

Remove All Objects

[cars removeAllObjects];

Replacing an Object

[cars replaceObjectAtIndex:1 withObject:@"Honda"];

*Find an Object using contain *

if ([cars containsObject:@"BMW"]){
     NSLog(@"Found BMW")
}

*Happy Coding :)