How to sort descending the largest number of elements in an array?

Question

ruby

It is necessary to sort the array in descending order by the largest number of occurrences of the same values, followed by the removal of duplicate elements.

Answer 1

array = %w[a b a b c d e g j a e c d k o k i l p a e c f d e a d e f s d v c ]
result = Hash[array.each_with_object(Hash.new(0)) {|e, h| h[e] += 1 }.sort_by {|k,v| -v}].keys

UPD:
Version #2

array = %w[a b a b c d e g j a e c d k o k i l p a e c f d e a d e f s d v c ]
array.sort_by {|v| -array.count(v)}.uniq