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...
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其他好文 时间:
2015-06-02 16:51:05
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117
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...
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编程语言 时间:
2015-06-02 13:15:48
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227
select 字段 ,count(1) as num ,sum(price) as price from table group by 字段 where 条件
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其他好文 时间:
2015-06-01 13:05:40
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127
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...
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其他好文 时间:
2015-05-30 10:34:15
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98
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 ...
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其他好文 时间:
2015-05-30 09:14:38
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135
public class Car { private String brand; private double price; public String getBrand() { return brand; } public void setBrand(S...
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编程语言 时间:
2015-05-29 23:00:57
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199
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...
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其他好文 时间:
2015-05-28 21:31:05
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281
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 ...
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其他好文 时间:
2015-05-28 15:30:51
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142
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...
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数据库 时间:
2015-05-27 20:39:13
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217
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...
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其他好文 时间:
2015-05-27 13:59:41
阅读次数:
211