How to calculate how many people have reviewed for JOSS

joss-reviewers.rb

### Find all the published reviewers
papers = Paper.visible
reviewers = []

papers.each { |p| reviewers << p.reviewers.each(&:downcase!) }

### Unique reviewers (922)
puts reviewers.flatten.uniq.count

### Find the highest reviewer counts
reviewer_counts = Hash.new(0)

reviewers.flatten.each do |reviewer_instance|
  if reviewer_counts.has_key?(reviewer_instance)
    reviewer_counts[reviewer_instance] += 1
  else
    reviewer_counts[reviewer_instance] = 1
  end
end

sorted = reviewer_counts.sort_by { |_key,value| value }.reverse.to_h

reviewer_table = File.open("reviewers.md", 'w')
reviewer_table.puts "| Handle | Count |"
reviewer_table.puts "|---|---|"

sorted.take(50).to_h.each do |reviewer, count|
  next if reviewer == "@arfon"
  reviewer_table.puts "| #{reviewer} | #{count} |"
end

reviewer_table.close

reviewers.md

Handle	Count
@luizirber	13
@amoeba	10
@brainstorm	8
@haozeke	8
@nicoguaro	8
@chilipp	8
@krother	7
@kevin-mattheus-moerman	7
@trallard	7
@fil	7
@zhampel	7
@dvalters	7
@kyleniemeyer	7
@corybrunson	7
@mattpitkin	7
@jsgalan	7
@rougier	6
@vsoch	6
@benmarwick	6
@ahwillia	6
@ziotom78	6
@acolum	6
@djmitche	6
@tacaswell	6
@kellieotto	6
@strengejacke	6
@mkhorton	6
@nhejazi	6
@ejhigson	6
@danielskatz	6
@stuartcampbell	5
@terrytangyuan	5
@hugoledoux	5
@jsta	5
@sgrieve	5
@mdoucet	5
@vc1492a	5
@ixjlyons	5
@mnarayan	5
@desilinguist	5
@iljah	5
@jdeligt	5
@sirsharpest	5
@nnadeau	5
@dfm	4
@richardlitt	4
@mgalloy	4
@benjamin-lee	4
@faustincarter	4