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JavaScript Introducing ES2015 Objects and New Collection Types Map

Posted by cyber voyager
cyber voyager
8,859 Points

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 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 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!

cyber voyager
cyber voyager
8,859 Points

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

Andrew Gursky
Andrew Gursky
12,576 Points

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

cyber voyager
cyber voyager
8,859 Points

Thank you Andrew :)

2 Answers

Pavel Trofimov
Pavel Trofimov
12,535 Points
Pavel Trofimov
Pavel Trofimov
12,535 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).

Osama Awan
PLUS
Osama Awan
Courses Plus Student 8,676 Points
Osama Awan
Osama Awan
Courses Plus Student 8,676 Points

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.