// # 给定数组 const start = [ '.a', '.a.1', '.a.1.2', '.a.1.3', '.a.4', '.a.5', '.b.1', '.b.2', '.b.2.3', ] // 最终解 const end = [ { title: 'a', children: [ { title: '1', children: [ { title: '2', }, { title: '3', } ], }, { title: '4', }, { title: '5', }, ] }, { title: 'b', children: [ { title: '1' }, { ...