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Articles by Nitin Aggarwal
Page 13 of 14
How to improve the readability of Swift code?
In this tutorial, you will learn how to improve code readability in the Swift language. You can follow a variety of techniques when writing code. By following these methods, you will be able to write more understandable code for yourself and other developers. Use Comments This is the most important thing we should do. When writing code, we often write logic and calculations. When we start, we have everything in our minds, but after a month, it's definitely difficult to remember everything, especially in large applications. The code is usually commented on single lines. As a result, we are better ...
Read MoreWhat is the use of the double question mark “??” in Swift?
In this tutorial, you will learn the use of double question marks (?) in the Swift language. In Swift, a double question mark (??) is called the "nil−coalescing operator". This operator is basically used to provide a default value in the case of nil. In other words, when a variable is nil and you want to provide a default value in the absence of a value, use this operator. According to Apple documentation The nil-coalescing operator (a ?? b) unwraps an optional a if it contains a value, or returns a default value b if a is nil. The expression ...
Read MoreMention the tools required to develop iOS applications
In this tutorial, we are going to study about different types of tools required to develop iOS applications. As we already know, there are approximately 1 billion iPhone users. Thus, Apple always provides a hassle−free environment for developers who want to build applications for iPhone, iPad, MacBook, and Apple Watch. Apple has built a strong ecosystem for developers so they can focus on writing code and building apps. Today, we will see what tools we need to develop applications on the Apple platform. Xcode This is an editor or IDE to write code for building apps. Apple released the ...
Read MoreName Some Advantages of Using Swift
This article will explain to you the advantages of using the Swift programming language. Introduction of the Swift language Swift is a clean and concise programming language that is growing fast and becoming increasingly popular. Swift was initially used for iOS development but has become very popular for many other things like macOS, watchOS, and server-side development. Apple introduced the Swift language as an open-source programming language as a replacement for Objective−C, C, and C++. The Swift language was created in 2014 and released publicly in 2015 by Apple Inc. We can say Swift is a modern programming language like ...
Read MoreExplain the difference between let and var in Swift
This article will explain the difference between let and var in the Swift language. Most of the time, we deal with different data types in any programming language. However, we need to identify values by name. These names are called variables. Like C, Swift uses variables to store and refer to values by an identifying name. Swift also makes extensive use of variables whose values can’t be changed. These are known as constants. They are more powerful than constants in C. Constants are used throughout Swift to make code safer and clearer in intent. This is because you work with ...
Read MoreWhat is plist in iOS?
In this tutorial, we will talk about how we can use the plist in the application to store information. Let’s first understand what is plist. What is plist? The plist file is also called the property list and is used by operating systems (e.g. iOS) and users. The information is stored in a key-value format similar to a dictionary. A plist file can contain different types of values like strings, arrays, dictionaries, booleans, dates, data, and numbers, such as integers. Most of these types correspond to native Swift types, such as Array and Bool. You can also store nested arrays ...
Read MoreWhat is the meaning of the question mark "?" in Swift?
In this tutorial, you will learn what is a question mark in the Swift language, how to use it, and what it is used for. What does the question mark indicate? This question mark indicates that a variable might contain a nil value or some value of type declared with the variable. Before learning what a question mark is, let's understand what are optionals in Swift. Optionals When you create a variable in the Swift language, either it can contain an initial value or it might be holding nothing at the initial point. In that ...
Read MoreWhat Is Defer in Swift?
In this tutorial, you will learn what the defer keyword is and how it can be used in Swift. You will see in what situations you can use the defer keyword. What is defer? A defer is a statement that is used for executing code just before transferring program control outside of the scope that the statement appears. The defer statement is not something you will need to use often in Swift. It will be useful in situations when you want to clean resources before they go out of scope. The defer keyword was introduced in the ...
Read MoreWhat is a guard statement in Swift?
In this tutorial, you will learn about what is a guard statement and how it is implemented in the Swift language. Let's learn. What is a guard statement? In Swift, the guard is a statement that transfers control between codes like an if-else statement. The guard statement is the most commonly used statement in Swift. When certain conditions are not met to allow the flow to continue, the guard statement is used to transfer flow control. A guard statement is similar to an if statement with one major difference. The if statement runs when a certain condition ...
Read MoreWhat are the collection types that are available in Swift?
In this tutorial, you will learn about all the collections available in the Swift language, such as arrays, dictionaries, and sets. Collection Types Array Set Dictionary These collections are generic in Swift, which means they can store values of any type but of the same kind. They can work with strings, ints, classes, structs, booleans, etc. You can store any kind of value in them and cannot insert the wrong type of value by mistake. If you define a string array, you cannot insert values of Int or any other type. Points to ...
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