How in Ruby, having such a hash, sort by condition?

Question

Ruby on Rails

For example, there is a hash like this:

list { :plan => {1000, 3000, 100}, :present => {530, 700,85 }}

You need to sort like this - the closer the present number is to the plan number, the higher it should be.
In our case, this should be the answer (in order):

list { :plan => {100, 1000, 3000}, :present => {85, 530, 700 }}

How can you do this?

Answer 1

In your every question, the logic of hashes was initially laid down, which is why you suffer.

arr = [ { plan: 1000, present: 530 }, { plan: 3000, present: 700 }, { plan: 100, present: 85 } ]
arr.sort_by {|v| v[:plan] - v[:present] }