es-grid-template/es/ali-table/utils/groupBy.js

es-grid-template

export default function groupBy(list, iteratee) {
  const groups = {};
  for (const item of list) {
    const key = iteratee(item);
    if (groups[key] == null) {
      groups[key] = [];
    }
    groups[key].push(item);
  }
  return groups;
}