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In Swift, the equivalent of the Objective-C method respondsToSelector is the responds property of the NSObject class. To check if an object responds to a particular selector, you can use the responds(to:) method which is declared in the NSObjectProtocol. Here's the syntax − if objectName.responds(to: #selector(methodName)) { // do something if the object responds to methodName } else { // do something else if the object doesn't respond to methodName } In this syntax, objectName is the object that you want to check, and methodName is the selector that you want to check ... Read More
CSS, or Cascading Style Sheets, is a powerful tool that provides a range of effects to create beautiful, dynamic web pages. One of the most important tools in the CSS is the ability to rotate elements. Rotating elements, create a unique designs and animations that capture users' attention and help communicate the message. Here, we will explore how to set a rotated element's base placement in CSS. Transform Property in CSS The Transform property allows to apply various transformations to elements, including rotation, scaling, and skewing. When a transform is applied to an element, the base location of the element ... Read More
CSS has developed from simple style sheets to a powerful language that can create complex and intricate layouts and designs. One of the most exciting features of CSS is to create 3D elements on web pages. With CSS 3D transforms, we can now create attractive 3D effects that were once only possible with JavaScript or Flash. In this article, we will take a look at how to set a 3D element's base placement in CSS. We will also explore the basics of CSS 3D transforms and how to use them to create a simple 3D element. What are CSS 3D ... Read More
The HTML input tag is a powerful tool that allows developers to create dynamic web pages. One useful feature of the input tag is the ability to select multiple files at once. HTML input tag is a commonly used element for creating web forms and enabling users to interact with web applications. One of the most common use cases for input tags is a file selection where a user can choose one or more files to be uploaded. The input tag in HTML has various attributes that allow us to customize the behavior of the tag. The most commonly used ... Read More
In Swift, you can create an additional initializer to provide default values for the properties. You can use the convenience keyword to add this functionality. Let's look at some examples of how to use a convenience initializer in the Swift language. What is a convenience initializer in Swift? In Swift, a secondary initializer in a class that provides extra or alternative ways to create an instance of that class is marked with the convenience keyword. The initialization procedure is streamlined and made simpler, which makes it easier for the developer to deal with the class. The designated initializer of the ... Read More
In real iOS applications, you often need to support localization to ensure the app's accessibility around the world. By incorporating localization into your app, you can gain more users. In Swift, we use the NSLocalizedString function to create a localized string. What is localization? Localization is the process of allowing various language support in your apps. Instead of utilizing the software in a single language, it helps to create a more localized experience for users. Localization will be quite simple to integrate in your application. Apple offers a totally native method for integrating localization in your program.Syntax The syntax for ... Read More
If you are a Linux user or administrator, you might have heard of term "BCC tools" or "BPF Compiler Collection." BCC is a powerful set of dynamic tracing tools that provides a simple yet effective way to monitor system performance, networking, and much more. In this article, we will discuss what BCC tools are, their benefits, and how to use them with examples. What are BCC Tools? BCC (BPF Compiler Collection) is a set of dynamic tracing tools built on top of eBPF (extended Berkeley Packet Filter) technology in Linux kernel. eBPF is a virtual machine that runs inside kernel ... Read More
In Swift, we can use methods like dropFirst, Index(after:), and many others that can remove the first character of a string. In this article, we are going to learn various examples of these functions and understand how can we remove the first character of a string. Using the dropFirst method In this method, we are going to use the dropFirst method to remove the first character from the string and make the new string start with the second character. In case the original string is empty or has a single character in it, the result will be an empty string.Example ... Read More
As a developer, you might find yourself using command line interface (CLI) quite often. CLI allows you to interact with your computer through a terminal window and run commands to perform tasks. One of most popular shells used in CLI is Bash shell. Bash is a powerful tool, but it can be overwhelming to manage your scripts, aliases, and functions. This is where Bash-it comes in. Bash-it is a framework for managing your Bash configuration files. It provides a collection of scripts, aliases, and functions that you can use to customize your Bash environment. With Bash-it, you can easily control ... Read More
In Swift, you can pass an array by reference in a function as an argument using inout keyword. In Swift, arrays are value types by default. In other words, they pass a value rather than a reference. If you pass an array to a function as an argument, it makes a copy and passes that copy to the function. First, let's understand what happens when we pass an array in a function as a value. func passByValue(_ array: [Int]) { array.append(100) } let numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] passByValue(numbers) ... Read More