rails array count occurrences of elements
names.inject(Hash.new(0)) { |total, e| total[e] += 1 ;total}rails array count occurrences of elements
names.inject(Hash.new(0)) { |total, e| total[e] += 1 ;total}ruby find frequency in array self.all
balls = [m1, m2, m3, m4]
most_idx = nil
groups = balls.inject({}) do |hsh, ball|
hsh[ball.color] = [] if hsh[ball.color].nil?
hsh[ball.color] << ball
most_idx = ball.color if hsh[most_idx].nil? || hsh[ball.color].size > hsh[most_idx].size
hsh
end
groups[most_idx] # => [m1,m2,m4]Copyright © 2021 Codeinu
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