On 9/9/10 3:51 AM, Noel Welsh wrote:
On Thu, Sep 9, 2010 at 4:35 AM, Scott Hickey<jscotthic...@gmail.com> wrote:
I was helping my son with his math homework tonight, working with
medians and wrote the following below. As I was looking at it, I was
wondering:
...
I think this is great code -- very clear.
What!?
Without a purpose statement, contract, or examples, it's difficult to
know what this code is supposed to do, much less say if it is doing
whatever it is supposed to do correctly.
But if I guess at what it's supposed to do (bad idea), then there's
still a free reference to `middle-ref'. Supposing that should be
`middle-position', the amended code blows up on the first example I tried:
(median (list 1))
list-ref: expects type <non-negative exact integer> as 2nd argument,
given: -1; other arguments were: (1)
David
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