Using array operations to simplify conditional complexity

gistfile1.txt

def build_date_filter(earliest_date, latest_date)
  return '' if !earliest_date && !latest_date
  latest_date_query = "publicationDate > #{earliest_date}" if earliest_date
  earliest_date_query = "publicationDate < #{latest_date}" if latest_date
  if latest_date_query && earliest_date_query
    "(#{latest_date_query} AND #{earliest_date_query})"
  else
    latest_date_query ? latest_date_query : earliest_date_query
  end
end

def build_date_filter(earliest_date, latest_date)
  return '' if !earliest_date && !latest_date
  query_arr = []
  query_arr << "publicationDate > #{earliest_date}" if earliest_date
  query_arr << "publicationDate < #{latest_date}" if latest_date
  query_arr.intersperse('AND')
  query_arr
    .unshift('(')
    .push(')')
    .join(' ')
end