Re: number-sequence

[Juri Linkov]

Luc Teirlinck <address@hidden> writes:
> (number-sequence 1 3 -1) or (number-sequence 1 3 0)

There is another case that makes sense: if INC is nil and TO is less
than FROM, then INC could default to -1, i.e.

    (number-sequence 3 1) => (3 2 1)

To do this you could replace in your version:

- If INC is nil, it defaults to 1 (one).
+ If INC is nil, it defaults to 1 (one) if TO is larger than FROM,
+ or to -1 if TO is less than FROM.

-     (or inc (setq inc 1))
+     (or inc (setq inc (if (< from to) 1 -1)))

BTW, it couldn't hurt to add examples to the docstring:

Examples:
    (number-sequence 1) => (1)
    (number-sequence 1 1) => (1)
    (number-sequence 1 3) => (1 2 3)
    (number-sequence 1 3 2) => (1 3)
    (number-sequence 3 1) => (3 2 1)
    (number-sequence 3 1 -2) => (3 1)

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