In Python, a generator is a function that returns an iterator that produces a sequence of values when iterated over. Generators are useful when we want to produce a large sequence of values – so these values do not need… Continue Reading
When you start implementing your own arithmetic algorithms you will sooner than later encounter overflow errors. Unlike arithmetic operators in C, arithmetic operator in Swift don’t overflow by default. Overflow behaviour is trapped and reported as an error. You have… Continue Reading
Closures are a powerful programming concept that enable many different programming patterns. However, for lots of beginning programmers, closures can be tricky to use and understand. This is especially true when closures are used in an asynchronous context. For example,… Continue Reading
“We should do (as wise programmers aware of our limitations) our utmost best to … make the correspondence between the program (spread out in text space) and the process (spread out in time) as trivial as possible.” —Edsger W. Dijkstra, “Go… 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
Protocols with associated types are a powerful, if somewhat treacherous, feature of Swift. Sometimes it’s fair to say that the only winning move is not to play it. As an example here is a recursive protocol of binary tree node… 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
Swift is a programming language that is designed to work with Apple’s ecosystem. However, it can run on Linux. It is not just written for Apple products. If you do not have Mac hardware or you do not want to… Continue Reading
Xcode Playgrounds help developers explore Swift language and Apple framework APIs and provide a scratchpad for experimentation. Since Xcode 12 playgrounds have been integrated with the new build system and can also used with Frameworks and Package dependencies. As long… 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