JavaScript Introducing ES2015 Objects and New Collection Types Map

Well, that's weird.

Hello, as I was watching this video I saw this:

 classroom.set('stevenJ', 'stevenJ');

Why is he using the same value on the set()? I am a bit confused about this. If someone would like to clear things up for me I would be very grateful.

Thank you very much. Stavros

Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,858 Points

Sorry Stavros. I am not very fluent in JS currently, so I am not sure why this was done. I hope you find an answer!

No worries Caleb, thank you for taking your time to comment :)

Haven't taken that particular course, so I don't know context. Best of luck though!

Thank you Andrew :)

2 Answers

Pavel Trofimov
Pavel Trofimov
12,534 Points

Unless I'm looking at a different part of the video, he's using

classroom.set('stevenJ', stevenJ);

The second parameter is without quotes. So I think what's happening is he's setting the key name first (that's "stevenJ"), and then the value (which is the object assigned to the variable stevenJ).

well there is nothing wrong or wired doing this classroom.set('stevenJ', 'stevenJ');. You can set the key same as it's value. so getting the value will result in classroom.get('stevenJ'); stevenJ, or what else you can do is.

let stevenJ = "anyname";

classroom.set('stevenJ', stevenJ);

Now the key will be 'stevenJ' and it's value will be anything inside that stevenJ variable.