require 'enumerator'

module External
  module Enumerable
    # def all? # :yield: obj
    #   not_implemented
    # end
    
    # def any? # :yield: obj
    #   not_implemented
    # end
    
    # def collect # :yield: item
    #   not_implemented
    # end
    
    # def collect! # :yield: item
    #   not_implemented
    # end
    
    # def detect(ifnone=nil) # :yield: obj
    #   not_implemented
    # end
    
    # def each_cons(n) # :yield:
    #   not_implemented
    # end
    
    # def each_slice(n) # :yield:
    #   not_implemented
    # end
    
    def each_with_index(&block)
      chunk do |offset, length|
        self[offset, length].each_with_index do |item, i|
          yield(item, i + offset)
        end
      end
    end
    
    # def entries
    #   to_a
    # end
    
    # def enum_cons(n)
    #   not_implemented
    # end
    
    # def enum_slice(n)
    #   not_implemented
    # end
    
    # def enum_with_index
    #   not_implemented
    # end
    
    # def find(ifnone=nil, &block) # :yield: obj
    #   detect(ifnone, &block)
    # end
    
    # def find_all # :yield: obj
    #   not_implemented
    # end
    
    # def grep(pattern) # :yield: obj
    #   not_implemented
    # end
    
    # def include?(obj)
    #   not_implemented
    # end
    
    # def inject(init) # :yield: memo, obj
    #   not_implemented
    # end
    
    # def map(&block) # :yield: item
    #   collect(&block)
    # end
    
    # def map!(&block) # :yield: item
    #   collect!(&block)
    # end
    
    # def max # :yield: a,b
    #   not_implemented
    # end
    
    # def member?(obj)
    #   include?(obj)
    # end
    
    # def min # :yield: a,b
    #   not_implemented
    # end
    
    # def partition # :yield: obj
    #   not_implemented
    # end
    
    # def reject # :yield: item
    #   not_implemented
    # end
    
    # def reject! # :yield: item
    #   not_implemented
    # end
    
    # def select(&block) # :yield: obj
    #   find_all(&block)
    # end
    
    # def sort # :yield: a,b
    #   not_implemented
    # end
    
    # def sort! # :yield: a,b
    #   not_implemented
    # end
    
    # def sort_by # :yield: obj
    #   not_implemented
    # end
    
    # def to_a
    #   not_implemented
    # end
    
    # def to_set(klass=Set, *args, &block)
    #   not_implemented
    # end

    # def zip(*arg) # :yield: arr
    #   not_implemented
    # end
  end
end