Swift

In Swift, you can use the guard statement to guard your code. The guard blocks access to critical parts of your code if a condition is not met. The guard statement works very similarly to an if statement. The main difference is that the guard statement is used to continue running code if a condition …

Guard in Swift: Early Exits Made Simple [Swift 5 Edition] Read More »

Autoclosures in Swift In Swift, an autoclosure offers a way to write cleaner code by leaving curly braces out. To create an autoclosure, use the @autoclosure modifier in front of the closure type. An autoclosure itself does not accept any arguments. When an autoclosure is called, it simply returns the value of the expression returned by …

@autoclosure in Swift: Simplify Closure Calls [Examples] Read More »

In Swift, Codable is a combination of Encodable and Decodable. Encodable means an object is convertible from Swift to JSON (or to another external representation). Decodable means an object is convertible from JSON (or other external representation) to Swift. Read my complete guide to JSON in case you’re unfamiliar with JSON. Practically every iOS app …

Codable in Swift: JSON Parsing Made Easy [in 2022] Read More »

In Swift, a lazy variable is a variable that gets initialized only when it is called for the first time. To put it another way, using a lazy variable, you can delay the initialization of stored property. This is a great feature due to the limitations in the computing power. A lazy variable does not …

Lazy Variables in Swift with Examples [Updated in 2022] Read More »

In Swift, a closure marked with @escaping means the closure can outlive the scope of the block of code it is passed into. In a sense, @escaping tells the closure to “stay up even after the surrounding function is gone”. But why is this useful? Let’s say you are performing an (asynchronous) network request such …

What Is @escaping in Swift Read More »

In Swift, both Float and Double are used to represent decimal numbers. The difference between a Float and a Double is in the precision: The precision of a Double is at least 15 decimal places. The precision of a Float can be as small as 6 decimals places. As a rule of thumb, you should …

What Is the Difference Between Float and Double in Swift? Read More »

To pass a function as a parameter into another function in Swift, the accepted parameter type needs to describe a function. For instance, this function accepts two regular parameters and a function parameter: Now you can call this function by passing it an argument that is any function that takes two doubles and returns a …

Swift How to Pass a Function as a Parameter Read More »