How to sort not simple hash (hash of hashes)

Question

I have a Hash like this

{ 55 => {:value=>61, :rating=>-147},
  89 => {:value=>72, :rating=>-175},
  78 => {:value=>64, :rating=>-155},         


        

Answer 1

There might be a better data structure, but (I'm assuming this is ruby) it's possible to do in Ruby by using the inline sort style to basically tell it how to compare the two. Here's a concrete example:

my_hash = { 
  55 => {:value=>61, :rating=>-147},
  89 => {:value=>72, :rating=>-175},
  78 => {:value=>64, :rating=>-155},
  84 => {:value=>90, :rating=>-220},
  95 => {:value=>39, :rating=>-92},
  46 => {:value=>97, :rating=>-237},
  52 => {:value=>73, :rating=>-177},
  64 => {:value=>69, :rating=>-167},
  86 => {:value=>68, :rating=>-165},
  53 => {:value=>20, :rating=>-45}
}

puts "MY HASH"
my_hash.each do |local|
  puts local
end

sorted_hash = my_hash.sort  { | leftval, rightval | rightval[1][:rating]<=>leftval[1][:rating] }

puts "SORTED HASH"
sorted_hash.each do |local|
  puts local
end