js 数组去重 归类 二级循环

		/* 【js去掉集合List重复项】
		删除集合重复项
		*dataList* 将要去重集合
		*key* 去重依据属性名称
		* name 去重后的名称字段
		* */
		removalDuplicate(dataList, key, name = '') {
			let resultList = [];
			let resultIds = [];
			let tem = {};
			for (let i = 0; i < dataList.length; i++) {
				if (!tem[dataList[i][key]]) {
					let obj = {};
					obj[key] = dataList[i][key];
					if (name) {
						obj[name] = dataList[i][name];
					}
					resultList.push(dataList[i][key]);
					resultIds.push(obj);
					tem[dataList[i][key]] = 1;
				}
			}
			return { resultList, resultIds };
		},

let { resultIds } = this.removalDuplicate(rows, 'classifNumber', 'classifName');

	// 下拉选择事项
		chengeItems(itemsNumber) {
			let that = this;
			if (itemsNumber) {
				findAllItem({ itemsNumber }).then(res => {
					if (res.code == 200) {
						let rows = res.rows;
						let { resultIds } = this.removalDuplicate(rows, 'classifNumber', 'classifName');
						//console.log('去重:', resultIds);
						for (let j = 0; j < resultIds.length; j++) {
							//console.log('同类:');
							let itemList = [];
							for (let i = 0; i < rows.length; i++) {
								if (resultIds[j].classifNumber === rows[i].classifNumber) {
									itemList.push({ ...rows[i] });
								}
								//console.log('item列表:' + i, { ...rows[i] }.classifName);
							}
							resultIds[j]['itemList'] = itemList;
						}
						this.itemList = resultIds;
						console.log('resultIds:', this.itemList);
					}
				});
			}
		},

效果图