@segment/analytics-next/dist/types/lib/group-by.d.ts

Analytics Next (aka Analytics 2.0) is the latest version of Segment’s JavaScript SDK - enabling you to send your data to any tool without having to learn, test, or use a new API every time.

type Grouper<T> = (obj: T) => string | number;
export declare function groupBy<T>(collection: T[], grouper: keyof T | Grouper<T>): Record<string, T[]>;
export {};
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