Dr. Derek Austin
Front End Developer at Self-Employed
Expertise: JavaScript, React, Node.js, SEO and web-performance.
Education: Virginia Commonwealth University
Dr. Derek Austin is a front end developer with more than 20 years of web developer experience. Austin specializes in improving the performance of Next.js/React apps. He has previously held contract developer roles for Propel Data Cloud, Hilton and Loop. Austin is a graduate of Virginia Commonwealth University with a master’s and bachelor’s degree in bioinformatics and a doctorate in physical therapy.
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Big O, Big Theta and Big Omega notations express an algorithm’s time and space complexity. Discover what each one is and what the differences between them are.
The question mark operator is used in JavaScript as an alternative to an if statement, especially where a value is assigned based on a conditional.
Null represents an intentional absence of a value, indicating a variable has been declared but has yet to be assigned a value. These are some of the most common methods for checking for null and values loosely equal to null in JavaScript.
JavaScript doesn’t have a dedicated sleep() function that causes the code to wait before resuming execution. Here's how to write a JavaScript sleep function using setTimeout().
JSON.stringify() and JSON.parse() are useful tools for handling JSON-formatted content in JavaScript, though they have some limitations. Here's how to use them.
The typeof operator in JavaScript is used to check the data type of a variable in code. It can determine if a variable's data type is an array, boolean or other.