Created
May 24, 2024 23:50
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uniqueBy
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const uniqBy = (arr, predicate) => { | |
if (!Array.isArray(arr)) { return []; } | |
const cb = typeof predicate === 'function' ? predicate : (o) => o[predicate]; | |
const pickedObjects = arr | |
.filter(item => item) | |
.reduce((map, item) => { | |
const key = cb(item); | |
if (!key) { return map; } | |
return map.has(key) ? map : map.set(key, item); | |
}, new Map()) | |
.values(); | |
return [...pickedObjects]; | |
}; |
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