JavaScript根据字符串末尾值分组并排序、isArray、throw、TypeError、substring

function groupingSorting(list) { if (!Array.isArray(list)) throw new TypeError(`list is not a Array`); if (list.length <= 0) throw new TypeError(`list length cannot be equal to 0`); let grouping1 = [], grouping2 = [], grouping3 = [], grouping4 = [], grouping5 = []; list.forEach(item => { let title = item.title, str2 = title.substring(title.length - 2), str3 = title.substring(title.length - 3); if (str2 === '公司' && str3 !== '分公司') { grouping1.push(item); } else if (str3 === '分公司' && str2 === '公司') { grouping2.push(item); } else if (str2 == '部门') { grouping3.push(item); } else if (str2 === '半晨') { grouping4.push(item); } else { grouping5.push(item); } }); return [...grouping1, ...grouping2, ...grouping3, ...grouping4, ...grouping5]; } // 源数据 let list = [ { id: 1, title: '1xxx公司' }, { id: 2, title: '2xxx分公司' }, { id: 3, title: '3xxx公司' }, { id: 4, title: '4xxx部门' }, { id: 5, title: '5xxx分公司' }, { id: 6, title: '6xxx部门' }, { id: 7, title: '7xxx' }, { id: 8, title: '8xxx半晨' }, { id: 9, title: '9xxx舒冬' }, { id: 10, title: '10xxx半晨' }, { id: 11, title: '11xxx李清照' }, { id: 12, title: '12xxx李白' }, ]; console.log(groupingSorting(list)); // (12) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]