Re: [Chicken-users] Number question

[Mario Domenech Goulart]

Hi William,

On Fri, 28 Sep 2007 08:19:24 -0400 William Ramsay <address@hidden> wrote:

> I'm trying to convert rgb values to hex strings.    The algorithm to
> make the conversion is simple enough.   The problem is that the math
> involved produces real numbers rather than whole numbers (i.e. I get
> 12.0 instead of just plain 12).    When I try to use this number
> against a list of equivalent hex strings (i.e. position 12 is "C") I
> get an error because 12.0 is a bad argument type for a list-ref.  How
> do I convert the 12.0 to 12?

You can use inexact->exact:

  csi> (list-ref '(1 2 3) (inexact->exact 2.0))
  3

Best wishes,
Mario