Given a non-empty 2D matrix matrix and an integer k, find the max sum of a rectangle in the matrix such that its sum is no larger than k. Example: Given matrix = [ [1, 0, 1], [0, -2, 3] ] k = 2 The answer is 2. Because the sum of rectangle [[0, 1], [
翻看该方法的参考文档,苹果对retainCount方法的描述如下: retainCount Do not use this method. (required) - (NSUInteger)retainCount Return Value The receiver’s reference count. Special Considerations This method is of no value in debugging memory management issues.Because an
前不久在做一个项目的时候,我用到了mvc的webapi返回了一个大数据,结果报了500错误,如下图所示: Server Error in ‘/’ Application. Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property. Des
在SSMS(Microsoft SQL Server Management Studio)里面,查看数据库对应的表的时候,会遇到"Lock Request time out period exceeded.(Microsoft SQL Server, 错误1222)",对应的中文错误提示为"已超过了锁请求超时时段. (Microsoft SQL Server,错误: 1222)",如下截图所示,不管是用一般权限的账号还是具有sysadmin角色的登录名都是如此. 这
#该脚本可以提取沪深两市上市公司股票信息,并按以下信息分类:(1)当天股价创近10个交易日新高的股票:(2)停牌的股票:(3)复牌不超过一个交易日或者新发行的股票 #将分类后的股票及其信息(股价新高.当前状态等)存入mysql数据库 from time import * import pandas as pd import tushare as ts from datetime import date import datetime import MySQLdb import sys reloa
处理oracle sql 语句in子句中(where id in (1, 2, ..., 1000, 1001)),如果子句中超过1000项就会报错.这主要是oracle考虑性能问题做的限制.如果要解决次问题,可以用 where id (1, 2, ..., 1000) or id (1001, ...) package windy.learn; import java.util.Collection; import org.apache.commons.lang3.StringUtils; p