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jkarmel/gist:a1153f9b4bfc87626a20

Created May 12, 2015 07:08
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frequencies
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gistfile1.rb
class Array
def frequencies(&block)
block ||= ->(x) {x}
Hash[group_by(&block).map {|k,v| [k, v.present? ? v.count : nil]} ]
end
end
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