ruby: sum corresponding members of two arrays
- by jjnevis
I've got two (or more) arrays with 12 integers in each (corresponding to values for each month). All I want is to add them together so that I've got a single array with summed values for each month. Here's an example with three values:
[1,2,3] and [4,5,6] = [5,7,9]
The best I could come up with was:
[[1,2,3],[4,5,6]].transpose.map{|arr| arr.inject{|sum, element| sum+element}} #=> [5,7,9]
Is there a better way of doing this? It just seems such a basic thing to want to do.
