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