| 1 | // Copyright 2017-2022 @polkadot/util authors & contributors
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| 2 | // SPDX-License-Identifier: Apache-2.0
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| 3 |
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| 4 | /**
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| 5 | * @name arrayChunk
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| 6 | * @summary Split T[] into T[][] based on the defind size
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| 7 | * @description
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| 8 | * Returns a set ao arrays based on the chunksize
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| 9 | * @example
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| 10 | * <BR>
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| 11 | *
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| 12 | * ```javascript
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| 13 | * import { arrayChunk } from '@polkadot/util';
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| 14 | *
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| 15 | * arrayChunk([1, 2, 3, 4, 5]); // [[1, 2], [3, 4], [5]]
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| 16 | * ```
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| 17 | */
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| 18 | export function arrayChunk(array, chunkSize) {
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| 19 | const outputSize = Math.ceil(array.length / chunkSize);
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| 20 | const output = Array(outputSize);
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| 21 |
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| 22 | for (let i = 0; i < outputSize; i++) {
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| 23 | const offset = i * chunkSize;
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| 24 | output[i] = array.slice(offset, offset + chunkSize);
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| 25 | }
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| 26 |
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| 27 | return output;
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| 28 | } |
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