typedash/dist/groupBy/index.cjs

modern, type-safe collection of utility functions

'use strict';

// src/functions/groupBy/groupBy.ts
function groupBy(array, getter) {
  return (array ?? []).reduce(
    (draftGroups, currentItem) => {
      const key = getter(currentItem);
      draftGroups[key] ??= [];
      draftGroups[key].push(currentItem);
      return draftGroups;
    },
    {}
  );
}

exports.groupBy = groupBy;
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