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Last change
on this file since a762898 was a762898, checked in by istevanoska <ilinastevanoska@…>, 6 months ago |
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Added visualizations
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File size:
263 bytes
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| [a762898] | 1 | function countBy(arr, mapper) {
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| 2 | const result = {};
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| 3 | for (let i = 0; i < arr.length; i++) {
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| 4 | const item = arr[i];
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| 5 | const key = mapper(item, i, arr);
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| 6 | result[key] = (result[key] ?? 0) + 1;
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| 7 | }
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| 8 | return result;
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| 9 | }
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| 10 |
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| 11 | export { countBy };
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