Artturi Jalli

To convert a Date object to milliseconds and milliseconds to Date object in Swift, extend the built-in Date class: Example usage: Let’s take a detailed look at why we want to do it this way and what is the 1970 thing. How Does It Work In Swift, you can extend existing types using the extension […]

In Swift, the self keyword refers to the object itself. It is used inside the class/structure to modify the properties of the object. You can assign initial values to properties in the init() method via self. For instance: In this guide, you learn what is self and when you should/should not use it. In addition,

In Swift, you can implement custom types using classes. A class acts as a factory for creating objects. For example, let’s create a Fruit class and two Fruit objects: This is the quick answer to what is a class in Swift. But if you are unfamiliar with classes, there is so much more to learn.

In Swift, you can implement custom types using structures. A structure acts as a factory for creating objects. For example, let’s create a Fruit structure and some Fruit instances of it: This is the quick answer for what is a structure in Swift. However, if you are unfamiliar with structures, there is so much more

In Swift, there is no do…while loop that is common in other programming languages. Instead, there is a repeat…while loop that does the exact same thing. Here’s an example piece of code that uses this looping construct to run through some numbers: Output: The repeat block is always executed at least once no matter what.

In Swift, the map() function can be used to apply a function for each element in a collection. For example, let’s square an array of numbers: Output: Here is an illustration of how the above code works: In this guide, you learn how to use the map() function with closures on different collection types in

In Swift, chained optional binding can lead to an “if let pyramid of doom” that looks like this: This is bad practice. However, there is a way to flatten this structure by: In this guide, you learn how to break the pyramids of doom using neater if-let statements and guard-let statements. Optional Binding in Swift

In Swift, you can add multiple init methods to a class by writing a convenience init method in an extension. For example, let’s create a Fruit class and add a second init method to it: Now you can use either one of the init methods. The Swift compiler determines which one to use based on

In Swift, the forEach function is used to perform an operation for each element in an array. For example, let’s print out an array of names using the forEach function: Output: In this guide, you learn how to use the forEach function to iterate over collections and ranges in Swift. ForEach Function in Swift In

In Swift, a for loop is used to repeat code. Commonly, you use for loops to iterate over collections in Swift. For example, let’s loop through a list of names using a for loop: Output: Here is a flowchart that depicts a for loop in Swift. In this guide, you learn everything about for loops