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【Best Time to Buy and Sell Stock III 】cpp
题目: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 complet...
分类:其他好文   时间:2015-06-02 16:51:05    阅读次数:117
solr特点三: 排序样例汇总
目的是提供solrj 实现 查询的样例参考单维度排序//查询条件query.setQuery(queryString);// add 是添加query.addSortField(field_price, ORDER.asc);//set是覆盖,也就是后面的覆盖前面的。query.setSortFie...
分类:编程语言   时间:2015-06-02 13:15:48    阅读次数:227
group by后统计个数
select 字段 ,count(1) as num ,sum(price) as price from table group by 字段 where 条件
分类:其他好文   时间:2015-06-01 13:05:40    阅读次数:127
【Best Time to Buy and Sell Stock II】cpp
题目: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 complet...
分类:其他好文   时间:2015-05-30 10:34:15    阅读次数:98
【Best Time to Buy and Sell Stock】cpp
题目:Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction ...
分类:其他好文   时间:2015-05-30 09:14:38    阅读次数:135
Spring使用教程(二)配置bean:静态工厂方法和实例工厂方法
public class Car { private String brand; private double price; public String getBrand() { return brand; } public void setBrand(S...
分类:编程语言   时间:2015-05-29 23:00:57    阅读次数:199
多项式回归模型(Office Prices)
题目:https://www.hackerrank.com/challenges/predicting-office-space-price   分析:还是上次的房价预测题目,指明要用多项式回归拟合。在多元多项式拟合时候,目标函数表示如下               对其目标函数求偏导得到                很容易写出代码。   代码: #coding:ut...
分类:其他好文   时间:2015-05-28 21:31:05    阅读次数:281
LeetCode 123 Best Time to Buy and Sell Stock III
123Best Time to Buy and Sell Stock IIISay you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find ...
分类:其他好文   时间:2015-05-28 15:30:51    阅读次数:142
Oracle查询结果列的加减、求和、连接、列值相乘
select prod.amount,prod.plansum,(prod.plansum-prod.amount) as borrow,d.enum_value from ----结果集相减(select t.Quo_Prod_List_Price * t.QUO_PROD_VOLUME as a...
分类:数据库   时间:2015-05-27 20:39:13    阅读次数:217
【Scrapy】Items容器
ItemsItem对象是种简单的容器,保存了爬取到的数据。其提供了类似于字典的API以及用于声明可用字段的简单语法。声明ItemItem使用简单的class定义语法以及Field对象来声明。import scrapy class Product(scrapy.Item): #Product类继承自Item类 name = scrapy.Field() price = scrapy.F...
分类:其他好文   时间:2015-05-27 13:59:41    阅读次数:211
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