During the hiring process companies expect to fill certain level of expertise slot and productivity requirements in a cost-efficient manner. Simply saying, they are not willing to pay expert level salary for junior level job. Read more...

It’s being a while since wrote something here. I am working a lot at the moment. Project is so big and roadmap is crazy. Almost no time for articles and interesting investigations. Still there is a lot of things that can and will be posted nearest time. Here are the... Read more...

Geography lesson. Alice is asked to list all neighbour countries of Switzerland. Alice is a smart girl and she responds: “Germany, France, Austria and Italy”. Few years after Alice goes to the University to study Computer Science. She receives similar question. Read more...

In April 2019 I didn’t know about a term generative art. I wanted to use Math and programming skills implement something visually pleasing. Metaballs seemed a good idea to start with. I collected some information and stumbled upon nice article of Jamie Wong “Metaballs and Marching Squares”. He mentioned “Voronoish”... Read more...

It is somehow counter-intuitive, but rounded corners in polygon is not that easy task. Here are two of many possible solutions of the problem presented as UIBezierPath extensions. Keep in mind that for both extension polygon is represented by array of points ordered as they appear on perimeter. Read more...

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Augmented Interval tree is a data structure to search for overlapping intervals. I have nothing much to add to the [article written by Davis Molinari(http://www.davismol.net/2016/02/07/data-structures-augmented-interval-tree-to-search-for-interval-overlapping/), so here is a Swift version: Read more...

Hey! Checkout my playground. Will update it with new code-math-motion-art experiments weekly. Read more...

The $1 Unistroke Recognizer is a 2-D single-stroke recognizer designed for rapid prototyping of gesture-based user interfaces. In machine learning terms, $1 is an instance-based nearest-neighbor classifier with a 2-D Euclidean distance function, i.e., a geometric template matcher. Read more...

AdditiveArithmetic was first presented in Swift 5. The protocol provides a basis for additive arithmetics on scalar values. From mathematical point of view it provides generic solution for Additive group. Read more...

Lately I was playing with graphic experiments that required Math and Physics. Thinking about sharing some code and thoughts. I can do in two ways: Read more...

This articles is a cheatsheet on organized and optimized data storage for iOS app. Read more...

The Optional type is an enumeration with two cases. .none is equivalent to the nil literal. .some(Wrapped) stores a wrapped value. You must unwrap the value of an Optional before you can use it. Read more...

When defining a protocol, it’s sometimes useful to declare one or more associated types as part of the protocol’s definition. An associated type gives a placeholder name to a type that is used as part of the protocol. The actual type to use for that associated type isn’t specified until... Read more...

The idea was to make the simplest possible solution which allows to use placeholders of different colors, resizes to placeholders size, will not overwrite a delegate meanwhile keeping all UITextView functions work as expected. Read more...

Managed to update Interactive Transition code sample. It needs some refactoring, pull requests are welcomed. Read more...

Python illustration for Validation of a Mathematical Model for Road Cycling Power James C. Martin, Douglas L. Milliken, John E. Cobb, Kevin i. McFadden, and Andrew R. Coggan Read more...

UICollectionView is an object that manages an ordered collection of data items and presents them using customizable layouts. (UICollectionview documentation) Read more...

A list comprehension is a syntactic construct available in some programming languages for creating a list based on existing lists. It follows the form of the mathematical set-builder notation (set comprehension) as distinct from the use of map and filter functions. Read more...

Working with collections is one of every-day-tasks for most developers. Read more...

The object is immutable if it cannot be modified after it’s creation. If the object can be modified, we say it is mutable. Read more...

I googled “functional programming swift” and the similar. Most of the articles on this topic create more questions than answers. Authors often skip important definitions and principles, and starts directly from .map-.reduce tutorial. Skipping the concept steals important building blocks, which leads to unstable foundation. Read more...

Closures are self-contained blocks of functionality that can be passed around and used in your code. Closures in Swift are similar to blocks in C and Objective-C and to lambdas in other programming languages. Swift’s closure expressions have a clean, clear style, with optimizations that encourage brief, clutter-free syntax in... Read more...

The function is a self-containing block of code for performing the specific task. The function is a thing, that we use every day. It’s like a building block for our code. Read more...