[plt-scheme] interfaces

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Fri May 1 15:10:06 EDT 2009

You can use them in contracts to avoid specifying a dependence on a
particular implementation, but still to guarantee you have certain


On Fri, May 1, 2009 at 2:07 PM, Doug Orleans <dougorleans at gmail.com> wrote:
> What are some practical uses of interfaces?  The only one I've noticed
> is tagging, e.g. printable<%>.  The fish-interface example in the
> Guide is not very convincing.
> --dougorleans at gmail.com
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