In Swift, [weak self] creates a weak reference to self in a closure. This prevents memory leaks due to strong reference cycles. However, to truly understand what this means, you need to understand the following concepts: In this guide, you are going to take a thorough look at each of these concepts. Finally, you are […]
[weak self] in Swift—Prevent Memory Leaks in Your Code (Easily) Read More »
In Python, you can use the in operator to check if a value exists in a group of values. For example: Similarly, you can check if a value is not in a collection with not in operation (combining the not operator and the in operator): The ‘in’ Operator in Python The in operator works with
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Regression testing is an essential aspect of software development, ensuring that new code changes do not adversely impact existing functionalities. When developers introduce new features or bug fixes, there is a possibility that these changes may unintentionally disrupt how the existing system operates. To mitigate this risk, teams employ regression testing to confirm that the
What Types of Regression Testing Can Be Automated: Insights into Efficient QA Practices Read More »
In Python, the built-in list() function converts an iterable object, such as string or tuple, to a list. For example, let’s convert a string to a list of characters: In this guide, you are going to see examples of using the list() function and how to make a custom object support it. When Use list()
The list() Function in Python Read More »
To check if an element is in an array in Swift, use the Array.contains() function. For example, let’s check if the name “Alice” is in an array of names: Output: Let’s see a more advanced example. Check If an Array Contains an Object with Specific Property You can use the contains() function in a more
Swift How to Check If an Element Is in an Array Read More »
To split a string to an array in Swift by a character, use the String.split(separator:) function. For example, let’s split a string by commas: Output: However, this requires that the separator is a singular character, not a string. To split a string to an array by a separator string, use String.components(separatedBy:) function. For example, let’s
Swift Split String to an Array Read More »
To get the length of a string in Swift, call the String.count property. For example: Output: Replace ‘count’ with ‘length’ in Swift Swift developers decided to call the length of a string ‘count’. However, if you prefer ‘length’ over ‘count’ you can change it by writing an extension to the String class. Naively, you could
Swift String Length (How to Count the Number of Characters) Read More »
To check the Swift version of your current Xcode project: If you click the Swift version you are going to see other Swift versions in a dropdown. These are all the other supported Swift versions available for this project. How to Check the Swift Version Programmatically To programmatically find out the Swift version of your
How to Check Swift Version Read More »
To load an image from a URL in Swift, extend the UIImageView to support loading images with the following class extension: Now you can call the loadFrom(URLAddress:) function for any UIImageView in your project. Example. If you have an UIImageView called myImageView + an image behind a URL in example.com/image.png, you can get and show
Swift 5: How to Load an Image from a URL Read More »
In Swift 5, you can hide the keyboard by touching anywhere on the screen with these two lines of code: This code adds a tap gesture recognizer into the current view that listens for actions that suggest that the user stopped editing the text field/text view. To make this code work, add it into your
Swift How to Make Keyboard Disappear Touching Anywhere Read More »
