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henryhamon/group_cons.rb

Created February 28, 2017 20:23
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Group Consecutive Numbers
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group_cons.rb
arr = [1, 2, 3, 5, 7, 8, 9, 20, 21, 23, 29]
arr.inject([]) { |a,e| (a[-1] && e == a[-1][-1] + 1) ? a[-1] << e : a << [e]; a }
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