Extension methods in .NET are one of my favourite parts of using C#. In this post, I'll show how you can achive the same thing in JavaScript by taking advantage of it's prototypal nature.

Be warned though, there are a couple of caveats that we need to be aware of though. Turns out it's quite easy to get unexpected bugs and break 3rd party libraries.

I find myself switching between C# and JavaScript quite a lot. Even though I've been doing that for years, there are still occassions where I get caught out by a language feature.

Here I go through a few of the key differences which have caught me out in the hope that writing about them stops it happening in the future.

If only things were that simple!

I accidentally typed out a couple of .NET LINQ statements while writing JavaScript and drew a blank on the equivalent method names.

In the hope of not forgetting again, here I dig into the equivalent of the .NET LINQ Select method in JavaScript. They're not identical, but I think for most people the differences won't matter.