Create a function that sums two arguments together. If only one argument is provided, then return a function that expects one argument and returns the sum.

‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful! Last week, I casually dropped the term “higher-order function” ...

Your browser does not support the audio element. Let’s get started by introducing what a library is, in JavaScript. Any program or functions you write to perform ...