On Aug 23, 3:23 pm, David Philp <[EMAIL PROTECTED]> wrote:
> 1+i < 2+i throws an exception ("invalid comparison with 1+i
> attempted"). Order[a, b] is the same idea as python's cmp, except
> that Order doesn't use "<", but some arbitrary ("canonical")
> ordering. (To avoid weirdness, small numbers precede bigger numbers).
>
> Sort[ list ] uses Order to perform the sort. This always works. List
> can contain any thing, including numbers, plots, etc, and they will
> always come sorted in the same order.
...
> Order is generally a pretty useful basic function, it would be
> worthwhile providing something like it.
We can just use cmp(), if we want. Python lets you define < and cmp()
separately, so we could leave cmp() total and still make < partial.
Carl
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