Wewill focus on **arguments** and **parameters**. In the `calculateBill()` function from the previous video, we hardcoded the tax amount. A best practice in JavaScript is to keep your code **DRY**, ...

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 ...

argSpecs: An array of objects that define the arguments for the resulting function.Each object must have either 1) required or 2) optional property and the property value must be 1) a string that ...