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. […]
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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
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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
‘if let’ Pyramid of Doom in Swift: How to Fix It Read More »
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
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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
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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
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To become a software developer fast, you need to learn to program quickly. But learning how to program is like learning how to play the piano. It takes a lot of practice and patience and you cannot really avoid it. If you push it really hard, you can become a job-ready software developer in under
How to Become a Sofware Developer (5+ Tips to Learn Quickly) Read More »
To initialize a struct in Swift, you do not need to write the init method. This is because, by default, there is a memberwise initializer that does the job behind the scenes. For instance: As you can see, this structure does not implement an init method. But you can create a Fruit object like this:
Swift How to Initialize a Struct (No ‘init’ with Structs?) Read More »
In Python, a FIFO queue is a linear data structure. It stores objects in a first in first out (FIFO) manner. For example, you can use the Queue class from the queue module as a thread-safe FIFO queue: Output: However, you could use a regular list as a FIFO queue as well. In this guide,
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In Swift, didSet and willSet methods act as property observers. For example: Output: Here assigning “Jack” to name triggered both willSet and didSet blocks. In this article, we are going to take a deeper dive into property observers in Swift. In essence, you are going to learn: Property Observers in Swift In Swift, you can
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