Module: Enumerable

Defined in:
lib/forest/rails/core_ext/enumerable.rb

Instance Method Summary collapse

Instance Method Details

#cluster ⇒ Object

clumps adjacent elements together >> [2,2,2,3,3,4,2,2,1].cluster{|x| x}

> [[2, 2, 2], [3, 3], [4], [2, 2], [1]]

apidock.com/rails/Enumerable/group_by#508-Array-clustering



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# File 'lib/forest/rails/core_ext/enumerable.rb', line 6

def cluster
  cluster = []
  each do |element|
    if cluster.last && yield(cluster.last.last) == yield(element)
      cluster.last << element
    else
      cluster << [element]
    end
  end
  cluster
end