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 […]
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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
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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
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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
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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
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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
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A linter is an automated tool that enforces common style guidelines and best practices. It is every developer’s best friend. If you are not using one, you are missing out. Linters are not a Python-only thing. They are commonly used in any software development project regardless of the language. This is all it takes to
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In Python, the built-in eval() function evaluates an expression passed as a string argument to it. For example: The eval() function takes the string argument, converts it into a Python expression, and runs it. The above code works exactly like this piece of traditional Python code: The eval() function can be useful in many ways.
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In Python, you can specify a textual representation of an object by implementing the __repr__() method into the class. For example, let’s create a Fruit class with a textual representation method: When you print a Fruit object, the __repr__() method is called and the text description of the object shows up in the console. Output:
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In Python, the difference between the is statement and the == operator is: For example: The variables a and b are different objects even though they have the same value. Thus comparing the values with the == operator returns True but checking if the variables refer to the same object results in False. In this
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