js按照数组中的某个字段进行分组

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(数组, '字段名称');