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tgmarinho/groupBy.ts

Created February 22, 2022 01:20
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group by in typescript
Raw
groupBy.ts
export const groupBy = <T, K extends keyof any>(
array: T[],
getKey: (item: T) => K
) =>
array.reduce((acc, current) => {
const group = getKey(current)
if (!acc[group]) acc[group] = []
acc[group].push(current)
return acc
}, {} as Record<K, T[]>)
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