I got my new MacBook Pro this week. These are my first impressions of the machine. I’ve moved from a MacBook Air 13" to a MacBook Pro 13".

My dream notebook would have been a 13" version of the 12" MacBook. It’s a shame that Apple didn’t introduce such a machine, but I understand the decision to keep things simple. Accordingly, I changed the planning for my setup:

• from iMac plus MacBook
• to MBP plus LG UltraFine 5K display (as a docking station).

One benefit of this switch is that I won’t have to wait until new iMacs come out in order to have a large high-resolution display at home.

The following function evalCode() traces the global variables that are accessed while evaluating a piece of JavaScript code.

In this blog post, we look at a syntactic puzzle. This is just for fun; there is nothing useful you can do with what we examine. It may, however, make you more aware of how JavaScript works, syntactically.

A proxy object can be seen as intercepting operations performed on its target object – the proxy wraps the target. The proxy’s handler object is like an observer or listener for the proxy. It specifies which operations should be intercepted by implementing corresponding methods (get for reading a property, etc.). If the handler method for an operation is missing then that operation is not intercepted. It is simply forwarded to the target.

Therefore, if the handler is the empty object, the proxy should transparently wrap the target. Alas, that doesn’t always work, as this blog post explains.

This blog post describes what you can do with functions that return tag functions for ES6 template literals.

For an introduction to template literals, tagged template literals and tag functions, consult chapter “Template literals” in “Exploring ES6”.

This blog post covers three ways of understanding Promises.

This blog post gives tips for using async functions. If you are unfamiliar with them, you can read chapter “Async functions” in “Exploring ES2016 and ES2017”.

This blog post explains the ECMAScript proposal “Asynchronous Iteration” by Domenic Denicola and Kevin Smith. It has reached stage 4 on 2018-01-25 and is part of ECMAScript 2018.

The ECMAScript proposal “Rest/Spread Properties” by Sebastian Markbåge enables:

• The rest operator (...) in object destructuring. At the moment, this operator only works for Array destructuring and in parameter definitions.

• The spread operator (...) in object literals. At the moment, this operator only works in Array literals and in function and method calls.

The ECMAScript proposal “global” by Jordan Harband is currently at stage 3. It provides a new standard way of accessing the global object.