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1105PHP笔记001
关于抽象类:abstract class Car{ abstract function getMaximumSpeed();}class FastCar extends Car{ function getMaximumSpeed(){ return 150; }}注意事项:如果实现的类也是抽象的,....
分类:Web程序   时间:2014-11-05 10:34:48    阅读次数:240
C++ 文件操作
用于文件操作主要有两个类ifstream,ofstream,fstream,例子如下1. 读操作#include using name space std;int main(){ cCar car; // initialize a car object ifstream...
分类:编程语言   时间:2014-11-05 00:07:33    阅读次数:262
去重查询某表中的信息,并删除另一表中的刚刚查出来的信息
select DISTINCT carnum from new_op_car_ownerdelete from new_op_car_owner where carnum in(select carnum from(select max(carnum) as carnum,count(carnum)...
分类:其他好文   时间:2014-10-31 19:01:13    阅读次数:159
去重的按某个字段进行去重sql
delete from op_car_owners2 where carnum in(select carnum from(select max(carnum ) as carnum ,count(carnum) as count from op_car_owners2 group by carnu...
分类:数据库   时间:2014-10-31 18:53:19    阅读次数:267
建索引sql
select * from op_breakrule where hphm='苏A2GD78'show index from op_car_owner;alter table op_car_owner add index index_chassisid(chassisid) ;drop index ...
分类:数据库   时间:2014-10-31 18:48:21    阅读次数:202
四.运算符(4)逻辑运算符
逻辑运算符 学习目标:理解逻辑运算符和使用(&& ||)。' ;$house=true;$car=true;if($house===true&&$car===true){ //分析: 用‘&&’逻辑符判断 ‘并且’ 要满足二个条件才为真。 echo 'I love you','';} else...
分类:其他好文   时间:2014-10-30 19:05:04    阅读次数:171
[Leetcode][JAVA] Gas Station
There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costscost[...
分类:编程语言   时间:2014-10-27 00:17:09    阅读次数:283
[leetcode]Valid Palindrome
问题描述: Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is...
分类:其他好文   时间:2014-10-25 21:30:51    阅读次数:191
类与类之间的简单传值
Main.m #import #import "Car.h" #import "Engine.h" #import "Lamp.h" /* 设计如下几个类,Car自定义初始化方法,初始化方法传入引擎对象和车灯对象。 当车启动的时候,会调用引擎转动,车灯亮灯,当车停止的时候调用引擎停止转动,车灯熄灭。 */ int main(int argc, const char * argv...
分类:其他好文   时间:2014-10-23 16:27:14    阅读次数:217
回文题
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a...
分类:其他好文   时间:2014-10-21 23:16:15    阅读次数:293
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