Bram replied:
> > The help for sort() says the following with respect to the function
> > reference argument:
> >
> > ...The function is invoked with two
> > items as argument and must return zero if they are equal, 1 if
> > the first one sorts after the second one, -1 if the first one
> > sorts before the second one. Example:
> > func MyCompare(i1, i2)
> > return a:i1 == a:i2 ? 0 : a:i1 > a:i2 ? 1 : -1
> > endfunc
> >
> > Does it really have to return -1, 0, or 1? Or is it OK to just return
> > negative, 0 or positive? That way it becomes easier:
> >
> > func MyCompare(i1, i2)
> > return a:il - a:i2
> > endfunc
> >
> > I think the docs should be updated if this is how it behaves. And if
> > not, the docs and the code should be updated so it does :-)
>
> Vim uses qsort(). My man page says that the value of the compare
> function can be any value less than, equal to or bigger than zero.
> Is it like that on all systems?
I believe it's the same on all systems. qsort() just compares the sign.
Maybe it should say:
The function is invoked with two items as argument and must return
an integer: zero if they are equal, positive if the first one
should sort after the second, or negative if the first one should sort
before the second.
Rob.
--
Robert Webb <[EMAIL PROTECTED]>,
MineSweeper3D - Take Minesweeper to a whole new dimension!
http://www.software3d.com/Mines3D
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