graphql/jsutils/groupBy.mjs

A Query Language and Runtime which can target any service.

import { AccumulatorMap } from "./AccumulatorMap.mjs";
export function groupBy(list, keyFn) {
    const result = new AccumulatorMap();
    for (const item of list) {
        result.add(keyFn(item), item);
    }
    return result;
}
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