vote count ideas

vote_count.rb

a = {candidate: "candidate1", weight: 1}
b = {candidate: "candidate1", weight: 1}
c = {candidate: "candidate2", weight: 1}

v = [a, b, c].group_by { |x| x[:candidate] }.map { |k,v| { k => v.inject(0) {|a, h| a + h[:weight]}}}

# => [{"candidate1"=>2}, {"candidate2"=>1}]

h = v.each_with_object({}) { |c,hash|
  c.each_pair {|k,v|
    hash[k] = v
  }  
}
  
# {
#    "candidate1" => 2,
#    "candidate2" => 1
#}

winner = h.max_by {|k,v| v}

#[
#    [0] "candidate1",
#    [1] 2
#]