With its first class functions, JavaScript doesn't really need lambdas, but it has them and they are useful. Find out the mysteries of the lambda in Jem 11. Lambda expressions sound advanced and ...

The first time I ever encountered a regular expression was many years ago now, but I still remember my first thoughts on it: What is this string-like thing? I don’t want to touch it, it looks scary. I ...

Things are even simpler because you don't have to store a reference to a function to pass it to another function or to make use of it. As already described, other languages have to introduce something ...