37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
import { toFinite } from "../util/toFinite.mjs";
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import { isIterateeCall } from "../_internal/isIterateeCall.mjs";
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//#region src/compat/math/range.ts
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/**
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* Returns an array of numbers from `start` (inclusive) to `end` (exclusive), incrementing by `step`.
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*
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* @param start - The starting number of the range (inclusive).
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* @param end - The end number of the range (exclusive).
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* @param step - The step value for the range.
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* @returns An array of numbers from `start` (inclusive) to `end` (exclusive) with the specified `step`.
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*
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* @example
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* // Returns [0, 1, 2, 3]
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* range(4);
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*
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* @example
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* // Returns [0, -1, -2, -3]
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* range(0, -4, -1);
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*/
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function range(start, end, step) {
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if (step && typeof step !== "number" && isIterateeCall(start, end, step)) end = step = void 0;
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start = toFinite(start);
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if (end === void 0) {
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end = start;
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start = 0;
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} else end = toFinite(end);
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step = step === void 0 ? start < end ? 1 : -1 : toFinite(step);
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const length = Math.max(Math.ceil((end - start) / (step || 1)), 0);
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const result = new Array(length);
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for (let index = 0; index < length; index++) {
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result[index] = start;
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start += step;
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}
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return result;
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}
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//#endregion
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export { range };
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