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dmorenogogoleva/groupBy.ts

Created June 6, 2021 11:09
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custom groupBy
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groupBy.ts
export function groupBy(collection: any[], iteratee: string) {
return collection.reduce((result, value) => {
if (!value.hasOwnProperty(iteratee)) return result
const key = value[iteratee]
if (!result || !result[key]) {
result[key] = [value]
return result
}
result[key] = [...result[key], value]
return result
}, {})
}
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