How to sort a ruby array by two conditions

Question

I want to sort this array by two different conditionals.

First I want to sort the array by type: A type can be either (1,2,3,4) and I want to sort them in this order 4

Answer 1

This should do it:

require 'ostruct'
arr = [
  OpenStruct.new(percent: 73, type: 1),
  OpenStruct.new(percent: 70, type: 4),
  OpenStruct.new(percent: 60, type: 4),
  OpenStruct.new(percent: 50, type: 4),
  OpenStruct.new(percent: 64, type: 1),
  OpenStruct.new(percent: 74, type: 2)
]


puts arr.sort_by { |a| [a.type % 4, -a.percent] }

output:

#
#
#
#
#
#