When recently entertaining myself with recursion in PHP I have come across a problem which asked to find whether a given word was a character-unit palindrome or not. I guess, a word of explanation on character-unit palindromes is needed in this place now. Basically, they are ...

From time to time, when doing coding for the web or otherwise, you might come across a tree of data to be turned into a correct HTML list (what "correct" means in this context will be explained in a minute). In order to meet the requirement, you have to be able to ...

Like in the real world, trees are ubiquitous in computer programming today. Frequently tree data structure turns out to be a perfect choice for modelling a naturally occurring phenomena and not only them these days. The bad news is, unlike one-dimensional arrays or other data ...

At times, it is desirable to be able to manipulate a HTML element styling and/or behavior on the basis of its current proximity, presence or absence in the viewport . The viewport is user's visible area of a web page on the screen. However, that is just the tip of the ...