Question

I am trying to rewrite the following statement from Coffeescript to Javascript:

d.data.name[0..1].toLowerCase()

Can someone please tell me what this statement means?

Answer 1

Ranges can also be used to extract slices of arrays. With two dots (3..6), the range is inclusive (3, 4, 5, 6); with three dots (3…6), the range excludes the end (3, 4, 5).

http://coffeescript.org/#slices

So this:

d.data.name[0..1].toLowerCase()

Translates to this:

d.data.name.slice(0, 1).toLowerCase();