RyanScottLewis · September 4, 2019 07:51 · Sep 4, 2019
diff --git a/cycling_slicer.rb b/cycling_slicer.rb
@@ -0,0 +1,44 @@
+class CyclingSlicer
+
+  def initialize(slices)
+    @slices  = slices.cycle
+    @slice   = @slices.next
+    @counter = 0
+  end
+
+  def slice?
+    @counter += 1
+
+    return false unless @counter % @slice == 0
+
+    @slice   = @slices.next
+    @counter = 0
+
+    true
+  end
+
+end
+
+module Enumerable
+
+  # Slice with a cycling list of slice widths.
+  #
+  # @example
+  #   (1..12).each_cycling_slice(1, 2, 3) do |slice|
+  #     p slice
+  #   end
+  #   # => [1]
+  #   # => [2, 3]
+  #   # => [4, 5, 6]
+  #   # => [7]
+  #   # => [8, 9]
+  #   # => [10, 11, 12]
+
+  def each_cycling_slice(*slices, &block)
+    slices = [1] if slices.empty?
+    slicer = CyclingSlicer.new(slices)
+
+    slice_after { slicer.slice? }.each(&block)
+  end
+
+end