JS Type Casting, Converting, and Coercion 

I've updated my code Gist to reflect the two Array differences for +[1] and +[1,2]. The Arrays get turned into the Primitive string values "1" and "1,2" before being converted to Numbers which is why we get the 1 and NaN results. Not sure why I had 0 written for the Objects. They will always be NaN. Thanks for pointing it out.

My pleasure!

Nope. Everything that is not falsy is truthy in JS. The falsy values are: false, 0, "", null, undefined, and NaN. Arrays are Objects. They are not on the list, so they are truthy. Run this: if( [ ] ){ console.log('array is truthy'); } However, think about this - Convert an empty Array to a String and you get "". Convert that into a Boolean and you get false.

@@SteveGriffith-Prof3ssorSt3v3 Ahh, ok. Thanks!

That was a copy paste error in my comments. The gist was updated to show that converting an empty object to a number gives you NaN.

It is in the code gist linked to in the description

fetch( ) is the modern JavaScript method for making HTTP Requests. XMLHttpRequest is the old JS method for making HTTP Requests.

@@SteveGriffith-Prof3ssorSt3v3 Thank you, Mr. Steve, in your view, what you will use to do better

Type node in your terminal and it'll run the code in that file.

@@aarong9327 it does not. When i try it says file could not be found.

It does on Linux and MacOS. I haven't tried on Windows.