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ZOJ 3333 Guess the price
题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=3758 题面: Guess the Price Time Limit: 1 Second      Memory Limit: 32768 KB In the television program "Shopping Street...
分类:其他好文   时间:2015-04-22 09:37:38    阅读次数:191
iOS KVC与KVO的简单使用
#import "ViewController.h" #import @interface DataModel : NSObject @property (nonatomic,copy)NSString *stockName; @property (nonatomic,assign)float price; @end @implementation DataModel @end ...
分类:移动开发   时间:2015-04-20 18:33:54    阅读次数:148
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<DataModel 0x7fe44b
self.model=[[DataModel alloc]init];     [self.model setValue:@"searph" forKey:@"stockName"];     [self.model setValue:@"10.0" forKey:@"price"];     [self.model addObserver:self forKeyPath:@"price" ...
分类:移动开发   时间:2015-04-20 18:32:29    阅读次数:152
Solr field alias
Field aliasAny field, function, or transformer can be displayed with a different name in the output document:ExampleMeaningid,price:crazy_price_fieldr...
分类:其他好文   时间:2015-04-20 16:27:44    阅读次数:128
SQL初级第二课
随着我们数据库越来越复杂 我们要掌握的姿势也要也来越多....首先建立个表create table shop(code int primary key identity (1,1),name varchar(50) not null,price int not null,brand varchar(...
分类:数据库   时间:2015-04-20 16:17:47    阅读次数:176
PAT 1090. Highest Price in Supply Chain (25)(DFS啊 )
PAT 1090. Highest Price in Supply Chain (25)(DFS啊 )...
分类:其他好文   时间:2015-04-19 21:26:15    阅读次数:158
mysql用户变量
mysql> SELECT @min_price:=MIN(price),@max_price:=MAX(price) FROM shop 注:赋值用:= 在set的使用之外,等于号都表示比较...
分类:数据库   时间:2015-04-18 17:50:30    阅读次数:124
LeetCode - Best Time to Buy and Sell Stock IV
Best Time to Buy and Sell Stock IV2015.4.17 05:27Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorit...
分类:其他好文   时间:2015-04-17 07:08:56    阅读次数:121
Best Time to Buy and Sell Stock II
Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complete a...
分类:其他好文   时间:2015-04-16 23:39:29    阅读次数:145
SQL必知必会 笔记 第九章 汇总数据
9.1聚集函数聚集函数(aggregate function):运行在行组上,计算和返回单个值的函数。 9.1.1AVG()函数AVG()通过对表中行数计数并计算特定列值之和,求得该列的平均值。SELECT AVG(prod_price) AS avg_price FROM Products WHERE vend_id = 'DLL01';只用于单个列:AVG()只能用来确定特定数值列的平均值,而...
分类:数据库   时间:2015-04-16 15:45:45    阅读次数:227
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