Re: [Haskell-cafe] quiry

Pixel wrote:

from http://pleac.sourceforge.net/pleac_haskell/numbers.html#AEN118 : -- "read" handles both octal and hexadecimal when prefixed with 0x or 0o -- here are versions adding the prefix and calling "read" hex s = read ("0x" ++ s) :: Integer oct s = read ("0o" ++ s) :: Integer

-- hex "45" == 69 -- oct "45" == 37

I want to remark that Integer does not necessarily use decimal internally; rumour goes that it is binary. But whatever it is, "show" turns that into decimal, e.g., show (hex "45") gives "69" indeed.