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 JavaScript Array Iteration Methods Combining Array Methods Combining filter() and map()

James Reich
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
James Reich
Front End Web Development Techdegree Graduate 14,854 Points
Posted by James Reich
.a{fill-rule:evenodd;}techdegree seal-36
James Reich
Front End Web Development Techdegree Graduate 14,854 Points

arr.charAt() vs arr[index]

What is the benefit of arr.charAt(0) instead of using arr[0]?

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

At one time, the benefit was reliable broswer compatibility when not all browsers recognized the bracket syntax.

Now, they mostly do the same thing except when given unconventional arguments. For example:

'abc'[true]        // undefined
'abc'.charAt(true) // 'b'
'abc'[3]           // undefined
'abc'.charAt(3)    // ''