Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript

Matthias Nörr
Matthias Nörr
8,614 Points
Posted by Matthias Nörr
Matthias Nörr
8,614 Points

"Useful Array Methods": Why does the teacher use the .join() - method?

Could we not just write:

print(inStock);

The .join() - method seems not needed?!

2 Answers

Michael Davis
PLUS
Michael Davis
Courses Plus Student 12,508 Points
Michael Davis
Michael Davis
Courses Plus Student 12,508 Points 
var myPets = ["dog", "cat", "hamster", "fish"];

print(myPets);  // This prints "dog,cat,hamster,fish"

print(myPets.join(", ")); // This prints "dog, cat, hamster, fish"

Hope that helps :-)

Matthias Nörr
Matthias Nörr
8,614 Points
Matthias Nörr
Matthias Nörr
8,614 Points

Thanks. So it is just more user friendly and reads better?!

Michael Davis
Michael Davis
Courses Plus Student 12,508 Points
Michael Davis
Michael Davis
Courses Plus Student 12,508 Points

Essentially yes. The .join() method could be used with anything.

Example:

myPets.join(", and a ");
// Results in "dog, and a cat, and a hamster, and a fish"

myPets.join("[my separator here]");
// Results in "dog[my separator here]cat[my separator here]hamster[my separator here]fish"