1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.arrayRange = arrayRange;
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7 |
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8 | var _assert = require("../assert");
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9 |
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10 | // Copyright 2017-2022 @polkadot/util authors & contributors
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11 | // SPDX-License-Identifier: Apache-2.0
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12 |
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13 | /**
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14 | * @name arrayRange
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15 | * @summary Returns a range of numbers ith the size and the specified offset
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16 | * @description
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17 | * Returns a new array of numbers with the specific size. Optionally, when `startAt`, is provided, it generates the range to start at a specific value.
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18 | * @example
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19 | * <BR>
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20 | *
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21 | * ```javascript
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22 | * import { arrayRange } from '@polkadot/util';
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23 | *
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24 | * arrayRange(5); // [0, 1, 2, 3, 4]
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25 | * arrayRange(3, 5); // [5, 6, 7]
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26 | * ```
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27 | */
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28 | function arrayRange(size) {
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29 | let startAt = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
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30 | (0, _assert.assert)(size > 0, 'Expected non-zero, positive number as a range size');
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31 | const result = new Array(size);
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32 |
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33 | for (let i = 0; i < size; i++) {
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34 | result[i] = i + startAt;
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35 | }
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36 |
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37 | return result;
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38 | } |
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