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! While you're at it, check out some resources Treehouse students have shared here.

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

Posted by alex lawless
alex lawless
9,661 Points

Hey! just studying creating Arrays in JS. What real world scenarios would 'new Array' be used instead of literal Array

(just curious)

2 Answers

Andrew Kiernan
Andrew Kiernan
26,892 Points

I'm not sure there is any real world scenario where you would want to use new Array() over an array literal. I don't believe there is any type of performance benefit, and it is uneccessarily verbose.

alex lawless
alex lawless
9,661 Points

Thanks Andrew

Walden Wang
Walden Wang
5,657 Points
Walden Wang
Walden Wang
5,657 Points

"A common error in JavaScript programs is to use an object when an array is required or an array when an object is required. The rule is simple: when the property names are small sequential integers, you should use an array. Otherwise, use an object." - Douglas Crockford