Programming Articles - Page 367 of 2501

In Haskell there are different methods to calculating the area of the rhombus. We can use sides, diagonals and height on the basis of which, its area can be computed by various methods. Algorithm Step 1 − The Text.Printf module is imported. Step 2 − Defined the Rhombus fuction Step 3 − Program execution will be started from main function. The main() function has whole control of the program. It is written as main = do. It takes two integers as diagonals and prints the area using the rhombusArea function. Step 4 − The ... Read More

This tutorial will help us in calculating the Lowest Common Multiple in Haskell Programming. The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers. It can be found by listing out the multiples of each number and finding the smallest multiple that is common to all of them. For example, the LCM of 4 and 6 is 12 because 12 is the smallest number that is a multiple of both 4 and 6. Method 1: Using user-defined lcm’ function In this method, the gcd function is used from the Data.List library ... Read More

This tutorial will help us in calculating the highest common factor using Haskell Programming. The highest common factor (HCF), also known as the greatest common divisor (GCD), is the largest positive integer that divides two or more integers without leaving a remainder. It is a measure of the largest positive integer that can divide two or more integers without leaving a remainder. Method 1: Using user-defined hcf function In this method, the function hcf’ is defined that takes two integers as input, and uses recursion and the modulo operator to repeatedly calculate the remainder of the larger number divided by ... Read More

Understanding iOS memory management is essential for iOS and macOS development. The concept of weak self and unowned self is challenging to understand, especially for beginners. ARC (Automatic Reference Counting) may have solved many problems for us. Swift still requires that you manage references a lot of the time when you are not working with value types. ARC or Automatic Reference Counting Automatic Reference Counting (ARC) is used for tracking and managing the app’s memory usage. In most cases, this means that memory management “just works” in Swift, and you don’t need to think about memory management yourself. ARC automatically ... Read More

The "some" keyword in SwiftUI is used to indicate that a type conforms with a protocol, but the exact conformance is not specified. The AnyView type, a type-erased view that can represent any view conforming to the View protocol, is commonly used in association with it. SwiftUI defines some View as a type that, without identifying the specific view type, can represent any view that complies with the View protocol. This enables more generalized and adaptable code. In other words, some keyword is used to declare Opaque types. In the Swift 5.1 version, this is introduced with the support of ... Read More

In swift, we have three keywords - Open, Public, and Final keyword. All these three words have different properties that help us understand whether the code can be extended to another module or not making the code easy to reuse. We will learn about the keywords' properties in this article.Example  Here's an example of how the open keyword is used in a class definition import Foundation open class Person { var firstName: String? var lastName: String? var age: Int? var address: String? } class Student: Person ... Read More

In swift, the completion handler is a block of code that is used to perform and handle the completion state of a task. For example, completion handlers are very commonly used in network requests using URLSession class. Basically, the completion handler is passed as a function argument and called when the task is completed. It does not impact whether the task is completed successfully or not. You can use the completion handler to perform different actions in your iOS applications. There are some common practices to implement the completion handler such as returning status after cleaning up the unused resources ... Read More

The init() method in Swift is used to initialize the objects of a class. When an object is created using the function Object() { [native code] } of the class, it is automatically called and establishes the object's initial state. To offer customized initialization behavior, such as establishing default values for properties or carrying out other setup chores, the init() method can be changed. Without returning any values, the function is sometimes used to initialize objects with some values. The class's designated initializer, the init() method, should be used to create objects of that class. Here is an example of ... Read More

In this article, you will learn about both the pattern in the Swift language. Also, you will see what are advantages of using these patterns. You will see examples of how you can adopt these patterns in your projects. Using the adapter pattern, you can design a system that allows two different interfaces to work together or communicate between them. You can implement this design pattern with the class or structure by conforming to a certain protocol. Then, you can use an instance of that class or struct to interact with an object that conforms to a different protocol. Using ... Read More

In this article, you are going to learn how to use isKindOfClass in swift with some different examples. It is required many times you need to check the type of a class to perform specific code accordingly. What is “isKindOfClass”? The isKind(of:) method can be used for checking the object type. You can check if an object is an instance of a given type. You can check it for a class or subclass depending on the boolean value returned. In Swift 5, the isKind(of:) method has been replaced by the is an operator and the is a keyword. The is ... Read More