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ea3eb4af83
Signed-off-by: Kristina Fefelova <kristin.fefelova@gmail.com> Co-authored-by: Andrey Sobolev <haiodo@gmail.com>
16 lines
326 B
TypeScript
16 lines
326 B
TypeScript
export function groupByArray<T, K> (array: T[], keyProvider: (item: T) => K): Map<K, T[]> {
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const result = new Map<K, T[]>()
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array.forEach((item) => {
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const key = keyProvider(item)
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if (!result.has(key)) {
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result.set(key, [item])
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} else {
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result.get(key)?.push(item)
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}
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})
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return result
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}
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