Remove duplicated anagrams from Array

anagram.rb

class Anagram

  def initialize
    @unique_anagrams = nil
  end

  def my_array
    @unique_anagrams ||= ["perro", "algo", "qwer","uuu", "lujo", "peorr","lago","edfr", "sadasd", "uljo", "erpro", "perro", "jolu"]
  end

  def get_clean_array
    ma              = my_array
    p ma
    unique_strings  = homologate_array ma
    indexed_results = indexing unique_strings

    indexes = grouping indexed_results

    p ">> After grouping  >>>> #{indexes}"

    findexes = flatting indexes

    p ">> After flatting  >>>> #{findexes}"

    ss = pick_indexes findexes

    p ">> After picking indexes >>>> #{ss.class} >>>> #{ss}"

    ma.delete_if.with_index { |_, index| ss.include? index }

    p ">> final ma >>>> #{ma}"
  end

  private

  def homologate_array(words)
    words.map {|w| w.downcase.split('').sort!.join('')}
  end

  def grouping(arr)
    arr.group_by { |name| name[0] }
  end

  def flatting(arr)
    arr.map { |k, v| v.drop(1).flatten }
  end

  def pick_indexes(arr)
    arr.map do |i|
      i.reject { |e| e.respond_to?(:to_str) }
    end.flatten
  end

  def indexing(arr)
    arr.each_with_index.select { |i, idx| arr.count(i) > 1 }
  end
end

Anagram.new.get_clean_array