RangeLists Parse and extract helpers for ranges of numbers. For example convert "1-5,8,10-11" to a List containing the numbers 1, 2, 3, 4, 5, 8, 10, 11. convert the list of numbers 1, 2, 3, 4, 5, 8, 10, 11 to a consolidated string "1-5,8,10-11".