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Awesome Visual Testing with Percy! (Sponsored)

3.5.2019
The more complex the applications I work on, the more I rely on and invest in testing. Whether it’s flow typing, jest tests, unit tests, or selenium tests, I rely on all of them to enforce integrity and save me from myself. One type of testing that’s incredibly important but often...

Flow Object.values(…)

2.5.2019
JavaScript typing utilities, like Flow and TypeScript, have become popular in JavaScript apps of all sizes. As I mentioned in our Script & Style Show typing podcast, typing is a great way to implicitly implement documentation and validation. Flow isn’t always easy to perfect, however,...

JavaScript Detect Async Function

29.4.2019
JavaScript async/await has changed the landscape of how we code. We’re no longer stuck in callback or then hell, and our code can feel more “top down” again. Async functions require the following syntax: async function myFunction() { } To use await with a function, the function...

Convert Video to Grayscale

24.4.2019
I’m a JavaScript fanatic but I’ve always been fascinated with media manipulation. Maybe it’s because I’ve secretly always wanted to be a designer, but I’m fine with being able to manipulate art with software instead of create the art myself. One type of art I’ve...

Remove Recent Applications from Dock

19.4.2019
A Mac user’s dock is a sacred place. We customize our dock to no end, and if you’re ultra organized like me, you even use dock separators to group your app icons. Apple recently implemented a feature which displays three recently used apps in the dock. For basic users that’s...

7 Useful JavaScript Tricks

16.4.2019
Just like every other programming language, JavaScript has dozens of tricks to accomplish both easy and difficult tasks. Some tricks are widely known while others are enough to blow your mind. Let’s have a look at {x} JavaScript tricks you can start using today! Get Unique Values of an Array...

Nenosil zbraň, četl verše. Slavný soukromý detektiv bořil mýtus

12.4.2019
Černí panteři, rasistický terorista, pomocník Tálibánu, miliardářští podnikatelé, celebrity. Různá obvinění, odlišná přesvědčení. Všechny postavy spojuje soukromý detektiv David Fechheimer, který v jejich kauzách slídil. Nenosil zbraň, sázel na slušnost a byl nejlepší z nejlepších. Zemřel 2. dubna...

Open FaceTime Call from Command Line

11.4.2019
Communication tools are always associated with UIs, and for good reason — if you want communication to be easy and intuitive, you need easy and intuitive interfaces. We need communication tools to provide the lowest barrier of entry, since not all users will be tech savvy. For tech experts...

How to Reverse a Video

9.4.2019
One of my favorite media utilities is ffmpeg. This command line utility allows us to do some pretty amazing stuff like; Slice videos Convert video formats Modify video speed Combine audio and video Every once in a while I see a meme or funny video that reverses a video for effect. Since ffmpeg does...

AI-Based Video Preview from Cloudinary (Sponsored)

8.4.2019
The early days of video on the web weren’t great. We started with custom browser plugins and codecs, then moved to Flash, and eventually we found our way HTML <video>. Once we solved the technology problem, we started using more video for content and advertising. The next problem...

Awesome Automation and Integration with Buddy

2.4.2019
One of my favorite services for years has been IFTTT (If this then that). Having a service that allows me to trigger a host of functionalities with one simple action is amazing! Posting a picture to Instagram can trigger IFTTT to send a tweet, post to Facebook, email to friends, etc. I’ve...

Set Branch Alias with Git

28.3.2019
Version control systems can be difficult to use, especially when you don’t use a UI app. Just think about main branch or revision names: svn uses “trunk”, git uses “master”, and mercurial (hg) uses “tip”. I need to switch between mercurial and...

Free Programming Courses from Harvard, MIT, Microsoft and more (Sponsored)

26.3.2019
Did you know that you can learn programming online from institutions like Harvard, MIT and Microsoft on edX.org? The nonprofit site offers 2000 online courses from 140 institutions worldwide. Courses are free to try. EdX has over 200 courses from Microsoft alone, including an 11 course program...

Build a Decentralized Web Chat in 15 Minutes

25.3.2019
In this 15 minute tutorial we’re going to build a simple decentralized chat application which runs entirely in a web browser. All you will need is a text editor, a web browser, and a basic knowledge of how to save HTML files and open them in the browser. We’re going...

Set Commit Author with git or hg

24.3.2019
Knowing who authored a code patch is a sacred and important practice in the world of software engineering. Knowing the author gives the reviewer an idea of trust level, know who to ask questions about the patch, and gives credit to the genius of an important fix. There have been times when...

Adding Search to Your Site with JavaScript

20.3.2019
Static website generators like Gatsby and Jekyll are popular because they allow the creation of complex, templated pages that can be hosted anywhere. But the awesome simplicity of website generators is also limiting. Search is particularly hard. How do you allow users to search when you have...

I Don’t Hate Arrow Functions

19.3.2019
TL;DR Arrow functions are fine for certain usages, but they have so many variations that they need to be carefully controlled to not break down the readability of the code. While arrow functions clearly have a ubiquitous community consensus (though not unanimous support!), it turns...

Write Your First Service Worker in 5 Minutes

18.3.2019
What is a service worker? A service worker is a little file that will allow you to cache files and other assets on a user’s machine. How is this different from server-side caching? Because the assets are stored on a user’s machine, rather than a server, there is no need to go across...

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