这段代码中, if (typeTime == typeDate) { data[i] = item.number; } else { data[i] = 0; }是否会覆盖掉data[i]的值

时间: 2024-02-17 17:00:26 浏览: 21
是的,如果在遍历 `pageData` 的过程中,多个数据匹配到了同一个日期,那么最后一次匹配的数据会覆盖之前匹配到的数据,从而导致 `data[i]` 的值被覆盖。 如果希望保留所有匹配到的数据,可以将 `data[i]` 的值定义为数组,并在匹配到数据时使用 `push` 方法将数据添加到数组中。例如: ```javascript function getMath() { console.log(this.dayList); let data = []; for (let i = 0; i < this.dayList.length; i++) { let matchingData = []; this.pageData.forEach((item, index) => { let typeDate = this.query.type == 0 ? item.date.split("-")[2] : item.date.split("-")[1]; let typeTime = this.query.type == 0 ? this.dayList[i].split("")[0] + this.dayList[i].split("")[1] : this.dayList[i].split("")[0]; if (typeTime == typeDate) { matchingData.push(item.number); } }); data[i] = matchingData; } return data; } ``` 这样,`data[i]` 中存储的就是一个数组,包含了所有匹配到的数据。

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SELECT TOP 10 tag_id, tag_code, RFID, storage_stock_id, material_id, material_code, data_status, material_name, spec, model, factory_name, supplier_id, supplier_name, lot_number, valid_to_date, material_type, pack_id, unit_code, unit, pack_type, sub_unit_code, sub_unit, dept_name, sub_conversion_rate, conversion_rate, status, original_barcode, udi, create_time, min_material_code, insurance_id, insurance_spec_code, order_in_code, order_in_id, is_used FROM ( SELECT ROW_NUMBER ( ) OVER ( ORDER BY create_time DESC ) PAGE_ROW_NUMBER, tag_id, tag_code, RFID, storage_stock_id, material_id, material_code, data_status, material_name, spec, model, factory_name, supplier_id, supplier_name, lot_number, valid_to_date, material_type, pack_id, unit_code, unit, pack_type, sub_unit_code, sub_unit, dept_name, sub_conversion_rate, conversion_rate, status, original_barcode, udi, create_time, min_material_code, insurance_id, insurance_spec_code, order_in_code, order_in_id, is_used FROM ( SELECT mt.tag_id, mt.tag_code, mt.RFID, mt.storage_stock_id, mss.material_id, mss.material_code, mt.data_status, mi.material_name, mi.spec, mi.model, mi.factory_name, mss.supplier_id, mss.supplier_name, mt.lot_number, mt.valid_to_date, mi.material_type, mss.pack_id, mss.unit_code, CASE WHEN mi.material_type = 'MAT-GZ' THEN mp.pack_unit ELSE mt.unit + '(' + CONVERT ( VARCHAR ( 10 ), mtd.quantity ) + mtd.unit + '/' + mt.unit + ')' END AS unit, mp.pack_type, mss.sub_unit_code, mss.sub_unit, sd.dept_name, mp.sub_conversion_rate, mp.conversion_rate, mt.status, mt.original_barcode, mt.udi, mt.create_time, mi.min_material_code, mi.insurance_id, mi.insurance_spec_code, mssd.order_in_code, mssd.order_in_id, mt.is_used FROM material_tag mt LEFT JOIN material_tag_detail mtd ON mtd.tag_id = mt.tag_id LEFT JOIN material_storage_stock_detail mssd ON mssd.stock_detail_id = mtd.stock_detail_id LEFT JOIN material_storage_stock mss ON mss.stock_id = mssd.storage_stock_id LEFT JOIN material_pack mp ON mp.pack_id = mss.pack_id LEFT JOIN material_info mi ON mi.material_id = mss.material_id LEFT JOIN sys_dept sd ON sd.dept_id = mss.store_dept_id LEFT JOIN material_storage_stock_batch mssb ON mssb.stock_id = mss.stock_id LEFT JOIN order_in oi ON oi.order_in_code = mssb.batch_no LEFT JOIN material_pack mpk ON mpk.material_id = mss.material_id AND mpk.is_purchase_unit = 1 WHERE mt.hospital_id = 1 AND mss.store_dept_id = 367 ) AS PAGE_TABLE_ALIAS ) AS PAGE_TABLE_ALIAS WHERE PAGE_ROW_NUMBER > 0 ORDER BY PAGE_ROW_NUMBER查询速度19秒如何添加索引

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