You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: utilities.rb
    path of file: ./repos/jekyll-scholar/lib/jekyll/scholar
    
    the code of the file until where you have to start completion: module Jekyll
  class Scholar
    require 'date'

    # Load styles into static memory.
    # They should be thread safe as long as they are
    # treated as being read-
    
      def sort(unsorted)
        return unsorted if skip_sort?

        sorted = unsorted.sort do |e1, e2|
          sort_keys
            .map.with_index do |key, idx|
            v1 = e1[key].nil? ? BibTeX::Value.new : e1[key]
            v2 = e2[key].nil? ? BibTeX::Value.new : e2[key]
            if (sort_order[idx] || sort_order.last) =~ /^(desc|reverse)/i
              v2 <=> v1
            else
              v1 <=> v2
            end
          end
            .find { |c| c != 0 } || 0
        end