map Size in Objective-C

In Objective-C, we use NSHashTable to create hashes. To get the size of the hash we can use the count method on the NSHashTable object. Here's an example:

// Create a hash table
NSHashTable *myHashTable = [NSHashTable hashTableWithOptions:NSPointerFunctionsStrongMemory];
// Add some objects to the hash table

[myHashTable addObject:@"apple"];

[myHashTable addObject:@"banana"];

[myHashTable addObject:@"cherry"];

[myHashTable addObject:@"orange"];
// Get the size of the hash table

NSUInteger hashSize = [myHashTable count];
// Print the size of the hash table

NSLog(@"Size of hash table is %lu", hashSize);

In this example, we create a hash table using NSHashTable and add some objects to it. Then we get the size of the hash table using the count method and print it using NSLog. The output of this code will be "Size of hash table is 4".