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28 lines
946 B
TypeScript
28 lines
946 B
TypeScript
/**
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* Copyright (c) taskylizard. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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export function groupBy<T, K extends keyof any>(
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arr: T[],
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key: (i: T) => K
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): Record<K, T[]> {
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return arr.reduce(
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(groups, item) => {
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// biome-ignore lint/suspicious/noAssignInExpressions: <explanation>
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;(groups[key(item)] ||= []).push(item)
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return groups
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},
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{} as Record<K, T[]>
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)
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}
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