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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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File size:
293 bytes
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| 1 | // @flow
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| 2 |
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| 3 | export default function uniqueBy<T>(arr: Array<T>, fn: T => any): Array<T> {
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| 4 | const identifiers = new Set();
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| 5 |
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| 6 | return arr.filter(item => {
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| 7 | const identifier = fn(item);
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| 8 |
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| 9 | if (!identifiers.has(identifier)) {
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| 10 | identifiers.add(identifier);
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| 11 | return true;
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| 12 | }
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| 13 | });
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| 14 | }
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