The actor model was proposed decades ago (1973) by Carl Hewitt as a way to handle parallel processing in a high performance network — an environment that was not available at the time. As a quick summary an actor is a message… Continue Reading
The Swift Standard Library currently implements the three most essential general-purpose data structures: Array, Set and Dictionary. These are the right tool for a wide variety of use cases, and they are particularly well-suited for use as currency types. But sometimes, in order to… Continue Reading
The producer–consumer problem also known as the bounded-buffer problem is a classic example of a multi-process synchronisation problem. It is defined as follows: The Producer generates items in random time intervals and writes them into a bounded buffer. The Consumer consumes these items… Continue Reading
Georgina loves making up weird sequences. Here is her latest: “1 2 4 8 10 20 22 44 46 92 94 188 190 380…” Write a program that finds the sum of the first 150 numbers in Georgina’s series. There… 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
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
Today I tried to explain my 6 years old daughter what programming means and what an algorithm does. I encountered scratchjr and was impressed how fast she “wrote” her first program on the ipad. Even if you’re not part of the Kindergarten… Continue Reading
Randomness is the lack of pattern or predictability. We can be sure of one thing, however: in the closed, digital universe of CPU cycles there is no true randomness, only pseudo randomness. Pseudorandomness, is often implemented in a way very… Continue Reading
Some weeks ago I have finished GameBench a simple two player board game framework implemented in the Swift language. It comes with a simple Connect4 App so you can learn how to use it and implement your own board games. SwiftGameBench framework… Continue Reading