Algorithms in Swift

Aug 29, 2018

Swift vs Objective C

Since the public introduction of Swift in 2014, many articles have been published comparing the differences between Swift and Objective-C. In this post I’m going to concentrate more on what I feel that matter most to practitioners like myself who have relatively long experience with both…

Jay Zahn

Aug 22, 2018

iOS File System and Operations

On iOS each app’s files are contained in a so-called sandbox to separate files in this app and to protect app’s data from others. Within the sandbox, the files are organized into different containers, such as Bundle Container, Data Container, and iCloud Container, as…

Jay Zahn

Aug 17, 2018

Check if a Binary Tree is a Binary Search Tree

In my last post we saw the basic tree traversal methods implemented in Swift. In this post we’re going to demonstrate applying such techniques in solving a real problem. Well, real in the sense that this problem was an interview question actually…

Jay Zahn

Aug 16, 2018

Tree Traversal with Swift

Tree traversal is a common theme in computational algorithms and there are many textbooks and internet resources on this so we’re not going to repeat the concept here. For the purpose of this article we’ll just review the three main depth-first traversal methods: In-Order…

Jay Zahn

Aug 16, 2018

About this publication

For a time that was too long, many MacOS and iOS programmers including myself, while loving their favorite programming language, had a unique complaint about it: it’s difficult to write any standard textbook algorithms or interview questions in Objective-C. The main reason is Objective-C…