gistfile1.rb

#---------------------
# how to use:
# h = range_hash({})
# h[1..3] = 'v1'
# h[8..12] = 'v2'
# h               #=> { 1..3 => 'v1', 8..12 => 'v2' }
#
# h[2..5]         #=> 'v1'
# h[4..6]         #=> nil
# h[5]            #=> 'v2'
#
def range_hash hash
    Hash.new { |this_hash,missing_key|
      found_key = this_hash.keys.find { |this_key|
                      this_key.is_a?(Range) &&
                      (
                        ( missing_key.is_a?(Integer) && (this_key.include?(missing_key)) ) ||
                        ( missing_key.class == Range && (missing_key.to_a & this_key.to_a).present? )
                      )
                  }
      found_key ? this_hash[found_key] : nil
    }.merge(hash)
end