In Python, you can write to a text file by following these three steps: You can skip the last step by using the with statement. For example: This piece of code creates a new file called example.txt and writes “Hello World” into it. In this guide, you are going to learn the basics of writing …
To pretty-print JSON in Python: For example: Where: Here is an illustration of what pretty printing does to JSON objects: In this guide, you learn why JSON is usually unreadable and how to use pretty printing to fix the problem. You will also see some common examples when pretty-printing. Before learning how to pretty-print JSON, …
Formatted string or F-string in Python makes it possible to insert variables into strings in a handy and readable way. For example: Output: Let’s compare this to the old-school approach using the format() method: The f-string is more convenient especially when the number of embedded variables is big. This is a comprehensive guide to using …
F-Strings in Python: A Complete Guide (with Examples) Read More »
In Swift, there are two types of values: To declare constants/variables in Swift: For example, to create a constant value in Swift, use the let keyword: And to create a variable in Swift, use the var keyword: Swift advises you to create constants whenever possible. You can see this in action when Xcode shows you …
What is the Difference between Let and Var in Swift? Read More »
Do you want to improve your iOS development skills? Then look no further. I’ve collected some must-know tips that are going to boost your efficiency, productivity, and code quality. 1. Let Xcode Take Care of Refactoring You should definitely learn how to use the built-in refactoring tool in Xcode. It is a really nice time …
In Swift, a typealias is an alias for an existing type. It allows you to call one data type by another name. Using type alias in a strategic way can make your code more readable and understandable. To declare a new typealias in your project, just use this syntax: Next up, I will show you …
Hi, my name is Artturi Jalli! I’m the author and owner of codingem.com—a tech blog with coding tutorials and software reviews. ✏️ At the beginning of 2021, I started writing technical articles on the popular platform Medium.com. I was quickly selected as one of the top writers on the platform. I received 300k+ reads in …
Did you know that you can replace this simple if-else statement in Swift: With this neat one-liner expression? This is possible thanks to what is called a ternary conditional operator in Swift. For your convenience, here is the structure of a ternary operator: Where: A ternary conditional operator offers a shorthand that is a useful way to replace simple if-else statements. …
In Swift, destructuring means pulling a tuple apart into multiple variables with a single assignment. Here is what tuple destructuring syntax looks like: Where: For instance, let’s create a function that returns a tuple: Now, here is one way to access the values of the tuple: But you can do this with a single line …
In Swift, inout parameters allow you to change an input passed into a function. For instance, let’s create a function that changes the original value of a number variable: In this guide, you learn why inout parameters are needed in Swift and how they work. Swift Function Parameters Cannot Be Changed In Swift, changing the …
