Essential Books

Using Generics

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For added safety we can define the type of object that the array contains: 

NSArray<NSString *> *colors = @[@"Red", @"Green", @"Blue", @"Yellow"];
NSMutableArray<NSString *> *myColors = [NSMutableArray arrayWithArray:colors];
[myColors addObject:@"Orange"]; // OK
[myColors addObject:[UIColor purpleColor]]; // "Incompatible pointer type" warning

It should be noted that this is checked during compilation time only.

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NSArray:
*NSArray
*Creating Arrays
*Accessing elements
*Reverse an Array
*Converting NSArray to NSMutableArray to allow modification
*Converting between Sets and Arrays
*Using Generics
*Comparing arrays
*Sorting Arrays
*Filtering Arrays With Predicates
*Enumerating using blocks
*Looping through
*Sorting array with custom objects
*Move object to another index
*Deleting Elements
*Insert Elements
*Adding elements
*Finding out the Number of Elements in an Array
*Add objects to NSArray
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