This article will explain to you how to define optional methods in the protocol. Before diving into making optional methods in the protocol, you will first learn what a protocol is and how to declare one in Swift. What is The Protocol? A protocol is a type that defines a group of methods or properties. Basically, you can define a blueprint of methods to specify behavior. A protocol is similar to interfaces in other programming languages. Syntax Here is the syntax of a simple protocol in Swift − protocol { // Properties // ... Read More

You often need to deal with the version and build number of the iOS application. It helps you to perform debugging operations on the server side. You can check which version or build the client (IOS app user) has. Based on that, you can debug the issues coming from the client side. Version and build numbers might be needed to display to the user to verify what version and build are currently running by the end user. To get the app version and build number in Swift, you can use the Bundle class, which provides access to the app's bundle ... Read More

Let's look at some examples of how to convert an array to a string. Method 1:Using Joined(seperator:) Syntax Swift provides us with a method joined(separator:) of an array that can be used to convert a Swift array to a string. This method returns a new string by concatenating the elements of the array, separated by the provided separator string. let wordInString = words.joined(separator: ", ") In order to use the joined() method, call it by array along with passing the separator whatever you want. Algorithm Step 1 − Initialize your array Step 2 − Call joined() method with ... Read More

Swift provides us with two different ways to concatenate or merge arrays in the Swift language.  You can use the + (plus) operator or the append() method. You will see other methods also of how you can merge multiple arrays in Swift. These methods are − Using plus (+) operator Using append(contentOf:) method Using flatMap() high-order function Using joined() method Using reduce() high-order function Method 1: Merge Arrays Using The + Operator Syntax let outputArray = firstArray + secondArray In order to use + operator to merge the arrays, simply it works as a binary operator that ... Read More

In Swift, you can use the trimmingCharacters(in:) method of the String type to trim parts of a string. It is an instance method that returns a newly created string made by removing the applied character set. This method accepts a parameter of type CharacterSet to perform leading and trailing characters. You can apply different types of CharacterSet to trim a string. There are some of the most commonly used CharacterSets, like − whitespaces whitespacesAndNewlines decimalDigits letters lowercaseLetters uppercaseLetters punctuationCharacters capitalizedLetters newlines You will learn some of them about how to perform different types of trimming of a string. ... Read More

In this article, you will learn how to add an element to an array in Swift. Before you begin to learn element insertion into an array, you will need to understand the type of array. Array Syntax // Declare an immutable array let arrayName: [valuetype] = [array element 1, array element 1, ...array element n] // Declare a mutable array var arrayName: [valuetype] = [array element 1, array element 1, ...array element n] In Swift, we can declare an array with let for immutable and var for a mutable array. For an immutable array, we have to provide the ... Read More

You will learn about the differences between static and class functions in this article. Many times, you might think they are the same thing, but that's not the case. Let's understand the difference between them. What are Static Functions? In Swift, a static function is a type of function that is associated with a type and not with an instance. This means that an instance is not required to call a static function as it can be called from the type itself. Example Here's an example of how you might define a static function in Swift − struct ViewPoint { ... Read More

The purpose of this article is to explain how an iOS application can send and receive change events using NSNotificationCenter. In an iOS application, you might need to send and receive events anywhere in the app. It may be useful to use the NSNotificationCenter class when you need to receive events anywhere in the app. In this case, you can listen to events and react accordingly. NSNotificationCenter class in the Foundation framework that provides a mechanism for broadcasting notifications to registered observers. It allows objects to communicate with each other and respond to events that occur within a program. How ... Read More

In this article, we will learn Why is there no main() function in Python. There is no doubt that Python has NO so-called main function, however, articles on the Internet frequently reference "Python's main function" and "suggest writing the main function." Their purpose may be to replicate the original primary methods, but many individuals are misled (or misunderstood) and create extremely complicated code as a result. Before we begin, we will answer the following two questions − What exactly is the "main function"? Why do some programming languages need the use of the main function? Some programming languages, ... Read More

In this article, we will learn some of the good Python frameworks for building a RESTful API. APIs are a fast and simple approach to building applications that can connect to other services. APIs are interfaces that allow developers to utilize their programming talents in one language (Python) and use them with whatever service they choose. Python is a popular API programming language due to its high level of abstraction and strong library support. What Is an API? The term "API" refers to a layer or interface that allows two applications to communicate without having to understand how they work. ... Read More