Array.range() (was: Suggestion: Array.prototype.repeat)

Sean Eagan seaneagan1 at gmail.com
Tue Jan 3 09:50:43 PST 2012


I think step should be > 0, and step towards end:

Array.range({start: 5, end: 0, step: 2}) -> 5, 3, 1

On Tue, Jan 3, 2012 at 11:42 AM, Axel Rauschmayer <axel at rauschma.de> wrote:
> I think it's fairly common for range implementations to provide an optional
> `step` parameter
>
>
> Good point. Maybe all of these parameters should be options:
>
> Array.range() -> 0, 1, 2, 3, ...
> Array.range({ start: 3 }) -> 3, 4, 5, 6, ...
> Array.range({ end: 5 }) -> 0, 1, 2, 3, 4
> Array.range({ step: 3 }) -> 0, 3, 6, 9, ...
> Array.range({ start: -2, step: -1 }) -> -2, -3, -4, -5, ...
> etc.
>
> The defaults of start and end and the comparison operator depend on the sign
> of step.
>
> --
> Dr. Axel Rauschmayer
> axel at rauschma.de
>
> home: rauschma.de
> twitter: twitter.com/rauschma
> blog: 2ality.com
>
>
>
>
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-- 
Sean Eagan


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