const groupBy = (array, f) => {
? ? let groups = {};
? ? array.forEach(function (o) {
? ? ? ? var group = JSON.stringify(f(o));
? ? ? ? groups[group] = groups[group] || [];
? ? ? ? groups[group].push(o);
? ? });
? ? return Object.keys(groups).map(function (group) {
? ? ? ? return groups[group];
? ? });
};
const arrayGroupBy = (list, groupId) => {
? ? let sorted = groupBy(list, function (item) {
? ? ? ? return [item[groupId]];
? ? });
? ? return sorted;
};
arrayGroupBy(數(shù)組, '字段名稱');
