15 lines
348 B
JavaScript
15 lines
348 B
JavaScript
function groupBy(arr, getKeyFromItem) {
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const result = {};
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for (let i = 0; i < arr.length; i++) {
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const item = arr[i];
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const key = getKeyFromItem(item, i, arr);
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if (!Object.hasOwn(result, key)) {
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result[key] = [];
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}
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result[key].push(item);
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}
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return result;
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}
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export { groupBy };
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