In 1868 Lewis Carroll published “The Alphabet-Cipher”. They say he did this in a kids magazine ?. While Carroll called his cipher “unbreakable” we know it is not. However it is still interesting to implement such a cipher as a… Continue Reading
Reversing a string in Swift is done by using the reversed() method on its characters, then creating a new string out of the result. Here’s the code: Reverse a String without using reversed built-in function in Swift can be done using Swift higher order… Continue Reading
ROT13 is a simple algorithm that shifts letters in a string forward 13 places. It’s not hard to write a rot13() function, but it is a little harder to wrap it up neatly so you avoid global variables while still making… Continue Reading
Whether or not type aliases are syntactic sugar or provide more code clarity, is a common source of debate among developers. While being able to write code in a more concise manner, it can also sometimes make the result harder to read… Continue Reading
UI testing is a great way to ensure that your UI interactions keep working as you’re adding new features or refactoring your app’s codebase – it keeps your app functional. Writing and running UI tests is kind of different from… Continue Reading
In computer science, the longest palindromic substring problem is the problem of finding a maximum-length substring of a given string that is also a palindrome. For example, the longest palindromic substring of “bananas” is “anana”. Some people will be tempted… Continue Reading
Greedy algorithms look for a simple, easy-to-implement solution to complex problems. These algorithms work by recursively constructing a smaller instance of the the same problem with a rule that is easy to understand and straightforward. The advantage is they are… Continue Reading
As a teenager I was used to implement simple mathematical algorithms on my Sharp pocket computer in BASIC. My first real Application was an AI board game written in the Pascal language on a Mac Classic II. It was a… Continue Reading
When Apple announced Swift 2 at the WWDC in 2015, they also declared that Swift was the world’s fist protocol oriented programming language. However protocols have been present in Java and Objective-C since many years. So why is Swift different? And what does protocol-oriented… Continue Reading
Today I wonder how simple and elegant I was able to implement the command pattern with Swift 2. I started as usual with a bunch of classes until I realised that Swift closures provide exactly what is needed to implement the command objects.… Continue Reading