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JavaScript JavaScript Foundations Objects Call and Apply

Posted by Dewi Tjin
Dewi Tjin
2,275 Points

Undefined Object?

I am not sure why my var greeting = andrew.genericGreet.apply(andrew, args1) is returning an undefinded object...

3 Answers

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

The andrew object has no genericGreet method/property, and you are trying to get to it and use the apply method on it.

Instead, you should be doing this on the genericGreet function, and pass andrew as a parameter:

var greeting = genericGreet.apply(andrew, args1);
Dewi Tjin
Dewi Tjin
2,275 Points
Dewi Tjin
Dewi Tjin
2,275 Points

After watching the video again, I moved the genericGreet object inside the andrew object and used

var greeting = andrew.genericGreet.apply(andrew, args1);

This works too. Thanks!

I took a print shot of the code and wanted to show people by posting it here but I don't know how to post codes in the forum like you so that people can cut and paste it to try. How do you do it?

And how do I test the treehouse codes on console like the videos??

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

That might work, but it wasn't really the point of the code challenge — your solution is more complicated than it should be.

You can read about posting code here, or check the Markdown Cheatsheet under the post text field.

Oh and you can find how to open the JavaScript console in various browsers here. Then you can just enter the code into the console and test it out.

Dewi Tjin
Dewi Tjin
2,275 Points
Dewi Tjin
Dewi Tjin
2,275 Points

Thanks!