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Share:Introduction Execution context is an abstract concept describing the environment within which JavaScript code is executed. The execution context will dictate if a variable, object, or another block of code is accessible or not. There are two types of execution contexts: global and function. Let’s examine the global execution context first. Global execution context The global execution context is the default execution context. Variables and
Share:Introduction JavaScript is single-threaded this means that the main thread on which code is executed runs one line at a time. There is no possibility of doing anything in parallel. Therefore, the run time is blocked until a task is completed. An example of blocking the run time is an infinite loop. However, the DOM API, setTimeout() , setInterval() methods are provided by the web
Share:What is the call stack? An understanding of the call stack will allow you to understand how execution order in JavaScript works. JavaScript is a single-threaded language; this means that it handles one task at a time. JavaScript code is executed by the JavaScript engine. Google’s V8 engine is an example of a popular JavaScript engine, there are others such as the SpiderMonkey and Rhino.
Share:Pre-Launch It’s been a busy 2 days, I pre-launched the JavaScript Technical Interview Guide and have sold 50% of the early bird copies. I made an announcement on Twitter and on Reddit. So far 280 upvotes on Reddit! Anyways keep reading – the juice is down below! So far I’ve emailed subscribers once with 80 practice coding exercises from chapter 1 (The Basics) . Besides
Share:Introduction Hi devs especially junior devs! For the past 5 months I’ve been super focused on writing a technical interview guide for juniors who want to break into the web-development industry. Since a solid grounding in JavaScript is paramount to clearing interviews focused on web applications, I wanted to write a guide that would help junior developers learn and practice at the same time. Why?
Share:This past month I’ve been working with an animation studio in Utah to help create a course on JavaScript for kid! It’s been a lot of fun! See the trailer here!
Share: Introduction I’m glad there are machine learning implementations in JavaScript. Abstracts a lot of the complexities associated with training & using machine learning models. I just hope ml5.js doesn’t become obsolete tomorrow or the next month! Python has been the modern de-facto language for #machinelearning. And there are tons of python libraries to implement machine learning tasks. However, JavaScript implementations of machine learning are
Share:Request the user to start their webcam stream Using the getUserMedia() API which allows you to access a user’s camera and mic without any plugins Streams have inputs (video) and outputs (video) The if-conditional checks if the getUserMedia is supported Syntax: navigator.mediaDevices.getUserMedia(constraints).then(successCallback).catch(errorCallback) The getUserMedia() method takes one argument called the MediaStreamConstraints object which allows you to specify the constrains/specifications of the media . In this
Share:Took me a day to finish the above + read on posenet and have it running on a local server. My webcam on my laptop isn’t all that great but should suffice for the time being. Below are steps for the project so far: Use getUserMedia method of the web media API to detect a webcam and get permission from the user to stream video
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