In the previous post, I generated a simple maze. I wasn’t sure the algorithm worked as intended unless I debugged or animated it. I chose the second option. I also added marking the beginning and end of the maze quest.
…There are plenty of maze generation algorithms, some are described here and here. I decided to use one to learn some Python. I chose Recursive Backtracker. You can find longer descriptions in both links, but briefly:
I used to create many graphs, usually the kind of dependency/hierarchy (see the previous post about Programming paradigms in JavaScript).
A long time ago I discovered a perfect tool for a developer to create and maintain various graphs – Graphviz. You can download it and use offline, but there are also online interpreters for quick experiments, for example:
…As a quick exercise, I wanted to read all URLs from my page’s sitemap instead of crawling the site. Just after I added a nested callback I decided to apply the Single Responsibility Principle and convert calls to Promises. Later I experimented with async/await and automatic conversion with Node’s promisify. Finally, I rewrote the solution in functional style using Ramda and reactive using RxJS. Read on to follow the evolution of callbacks in JavaScript.
…In modern web, you often see pages that have a big fancy header with a menu. It would be impractical to keep that menu visible all the time when scrolling because it would occupy too much of screen space. Therefore those pages often introduce a smaller header just with the navigation and logo that will be displayed as user scrolls down. I will show how to easily create such a header and add some animation to it.
…This post is a quick summary of the differences in JavaScript variable declaration.
Before ES2015 (previously named ES6), there was only one keyword to declare variables: var. The newer standard introduced two extra useful keywords: let and const.
Briefly:
var declares “almost global” variableslet declares block variablesconst declares block read-only variablesExplanation follows.
…I once had a desire to provide a list of shortcuts on the home page for my blog’s new users. I didn’t like the default WordPress’ blog page to be just a list of posts. I didn’t think that sidebar widgets grouping posts by date, category or tag would be helpful enough to grasp the versatility of the topics I cover here. I wanted to display a clear list of links with what a user can read about.
…If you want to fix an issue or enhance others’ GitHub repository, don’t be afraid – it’s fairly simple. I will show by example all the steps that are necessary.
I wanted to add support for two languages (TypeScript and JSON) to a WordPress plugin providing a Code block. You can read more about my choice and configuration in WordPress for developers – displaying source code and review of code sharing services.
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