Learn how to create a callback function in JavaScript and use it for various purposes, such as asynchronous programming, modularity, flexibility, and custom events.

Those are examples of higher-order functions that accept functions as arguments, but plenty of them return functions as well. If you’ve ever seen a function call that has two sets of parentheses ...

Parsing the optional arguments on a JavaScript function call can be a complex process when number of arguments increases. Usually the code ends up looking something like this: Basically argShim ...

We all know javascript doesn't support strict typing unlike other languages. So if a function, like the one shown below, expects it's arguments to be of certain types, we must implement type checking ...

Every now and then I need to have a method support 2 or 3 arguments, providing a default value for one of them if only 2 are specified. My typical solution is to check the number of arguments passed ...