On Thu, 24 Aug 2017 14:31:41 +0100 Chris Vine <vine35792...@gmail.com> wrote: > On Wed, 23 Aug 2017 22:05:37 -0800 > Christopher Howard <christopher.how...@qlfiles.net> wrote: > > Hi, in another lisp I have been working with, it has <, >, and == > > (structure equality) operators which can take string arguments, > > number arguments, or a mixture of both. But it seems in guile that > > there are separate comparison operators for strings and for > > numbers. This makes sense but is not very convenient for my present > > purpose. Is there some other guile operators or extension operators > > that will handle both? I could make some I'm sure, but I don't want > > to reinvent the wheel. > > The predicate equal? will compare numbers, strings and records. > > https://www.gnu.org/software/guile/docs/master/guile.html/Equality.html#index-equal_003f
I meant to add, but failed to do so, that as far as I am aware there is no built-in polymorphic < or > procedure that will take strings as well as numbers. As a simple work-around you could use type predicates in a cond expression to dispatch the appropriate comparison procedure for the type in question. Chris
