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super((array.map { |element| block.call(element).clone }.group_by { |element| element.delete_at(0) }).to_a)

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  it "should correctly sort the array" do
    result = [
...

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module Enumerable
  # Sorts the enumeration by mapping the
  # values in the enumeration through the given block.
...

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require File.dirname(__FILE__) + '/../spec_helper'

describe Enumerable, "when sorting in multiple directions" do
...

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module Enumerable
  # Sorts the enumeration by mapping the
  # values in the enumeration through the given block.
...

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module Enumerable
  # Sorts the enumeration by mapping the
  # values in the enumeration through the given block.
...