Tom Lane wrote:
> If you want to allow the 3-parameter form to specify a negative step
> size, that's fine. But don't use a heuristic to guess the intended
> step direction.
Have to agree. Ever used MatLab? They have a fairly intuitive approach:
1:5 => [1 2 3 4]
1:2:5 => [1 3 5]
5:1 => empty matrix
5:-1:1 => [5 4 3 2 1]
Basically, step size is assumed to be +1, unless provided (in their syntax,
as the second argument when 3 arguments are given). Empty ranges produce an
emty result.
Cheers,
Claudio
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