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...
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其他好文 时间:
2015-04-22 09:37:38
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191
#import "ViewController.h"
#import
@interface DataModel : NSObject
@property (nonatomic,copy)NSString *stockName;
@property (nonatomic,assign)float price;
@end
@implementation DataModel
@end
...
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移动开发 时间:
2015-04-20 18:33:54
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148
self.model=[[DataModel alloc]init];
[self.model setValue:@"searph" forKey:@"stockName"];
[self.model setValue:@"10.0" forKey:@"price"];
[self.model addObserver:self forKeyPath:@"price" ...
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移动开发 时间:
2015-04-20 18:32:29
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152
Field aliasAny field, function, or transformer can be displayed with a different name in the output document:ExampleMeaningid,price:crazy_price_fieldr...
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其他好文 时间:
2015-04-20 16:27:44
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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(...
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数据库 时间:
2015-04-20 16:17:47
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176
PAT 1090. Highest Price in Supply Chain (25)(DFS啊 )...
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其他好文 时间:
2015-04-19 21:26:15
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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...
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数据库 时间:
2015-04-18 17:50:30
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124
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...
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其他好文 时间:
2015-04-17 07:08:56
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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...
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其他好文 时间:
2015-04-16 23:39:29
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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...
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数据库 时间:
2015-04-16 15:45:45
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227