22 lines
573 B
JavaScript
22 lines
573 B
JavaScript
// Generate an integer Array containing an arithmetic progression. A port of
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// the native Python `range()` function. See
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// [the Python documentation](https://docs.python.org/library/functions.html#range).
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export default function range(start, stop, step) {
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if (stop == null) {
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stop = start || 0;
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start = 0;
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}
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if (!step) {
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step = stop < start ? -1 : 1;
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}
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var length = Math.max(Math.ceil((stop - start) / step), 0);
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var range = Array(length);
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for (var idx = 0; idx < length; idx++, start += step) {
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range[idx] = start;
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}
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return range;
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}
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