What is the key difference between NSDictionary and NSMutableDictionary?

Main Difference is: NSMutableDictionary is derived from NSDictionary, it has all the methods of NSDictionary. NSMutableDictionary is mutable( can be modified) but NSDictionary is immutable (can not be modified).

What does KEYS () do in Python?

keys() method in Python Dictionary, returns a view object that displays a list of all the keys in the dictionary in order of insertion. Parameters: There are no parameters. Returns: A view object is returned that displays all the keys. This view object changes according to the changes in the dictionary.

How do you create a dictionary in a list?

To convert a list to a dictionary using the same values, you can use the dict. fromkeys() method. To convert two lists into one dictionary, you can use the Python zip() function. The dictionary comprehension lets you create a new dictionary based on the values of a list.

What is Nsobject in Swift?

The root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects.

How to create a NSDictionary in Microsoft Docs?

Factory method to create a new NSDictionary that is a copy of the specified source NSDictionary. Creates a new dictionary from the contents of a PropertyList located in the specified file. Factory method to create a new NSDictionary initialized with the specified obj (value) and key.

Which is an example of an NSDictionary class?

The NSDictionary class declares the programmatic interface to objects that manage immutable associations of keys and values. For example, an interactive form could be represented as a dictionary, with the field names as keys, corresponding to user-entered values.

What is the syntax for NSDictionary in Xcode?

There is modern Objective C syntax that makes it easier for us to create and retrieve objects. Xcode actually changes to required format in build time. The syntax for initialization and accessing is as shown below. Creates and returns an empty dictionary.

How to create a dictionary using NSMutableDictionary?

NSMutableDictionary is mutable ( can be modified) but NSDictionary is immutable (can not be modified). To create a dictionary you can use static methods, or initialization methods. + (instancetype)dictionaryWithObject: (id)object forKey: (id )key;

What is the key difference between NSDictionary and NSMutableDictionary? Main Difference is: NSMutableDictionary is derived from NSDictionary, it has all the methods of NSDictionary. NSMutableDictionary is mutable( can be modified) but NSDictionary is immutable (can not be modified). What does KEYS () do in Python? keys() method in Python Dictionary, returns a view object that…