38 lines
1.4 KiB
JavaScript
38 lines
1.4 KiB
JavaScript
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//#region src/array/chunk.ts
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/**
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* Splits an array into smaller arrays of a specified length.
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*
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* This function takes an input array and divides it into multiple smaller arrays,
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* each of a specified length. If the input array cannot be evenly divided,
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* the final sub-array will contain the remaining elements.
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*
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* @template T The type of elements in the array.
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* @param {T[]} arr - The array to be chunked into smaller arrays.
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* @param {number} size - The size of each smaller array. Must be a positive integer.
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* @returns {T[][]} A two-dimensional array where each sub-array has a maximum length of `size`.
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* @throws {Error} Throws an error if `size` is not a positive integer.
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*
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* @example
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* // Splits an array of numbers into sub-arrays of length 2
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* chunk([1, 2, 3, 4, 5], 2);
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* // Returns: [[1, 2], [3, 4], [5]]
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*
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* @example
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* // Splits an array of strings into sub-arrays of length 3
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* chunk(['a', 'b', 'c', 'd', 'e', 'f', 'g'], 3);
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* // Returns: [['a', 'b', 'c'], ['d', 'e', 'f'], ['g']]
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*/
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function chunk(arr, size) {
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if (!Number.isInteger(size) || size <= 0) throw new Error("Size must be an integer greater than zero.");
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const chunkLength = Math.ceil(arr.length / size);
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const result = Array(chunkLength);
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for (let index = 0; index < chunkLength; index++) {
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const start = index * size;
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const end = start + size;
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result[index] = arr.slice(start, end);
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}
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return result;
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}
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//#endregion
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exports.chunk = chunk;
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