Question

I’m trying to do exactly this, but with CoffeeScript:

# ruby:
items.map {|item| item.price * item.quantity }.reduce(:+)

What I have so far:

# coffeescript:
item.price * item.quantity for item in items

How can I sum all the items in the array? More generally, how can I perform any operation across all the items in the array (in Ruby this would be inject or reduce)?

Answer 1

Nevermind, I found it. It’s done with reduce

(item.price * item.quantity for item in items).reduce (x, y) -> x + y