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Creating an Invisible Index
OCP:05322.An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERStable using the following command:SQL>CREATE INDEX ord_...
分类:其他好文   时间:2014-06-06 20:56:28    阅读次数:303
mongodb----pymongo的用法
pymongo是python的一个模块,可能通过sudo pip install pymongo来安装。导入pymongoimport pymongo创建连接conn = pymongo.Connection("127.0.0.1",27017)查看所有的数据库conn.database_names...
分类:数据库   时间:2014-06-06 20:11:20    阅读次数:335
LA 3905 Meteor 扫描线
The famous Korean internet company nhn has provided an internet-based photo service which allows The famous Korean internet company users to directly ...
分类:其他好文   时间:2014-06-06 17:20:53    阅读次数:256
POJ1573——Robot Motion
Robot MotionDescriptionA robot has been programmed to follow the instructions in its path. Instructions for the next direction the robot is to move ar...
分类:其他好文   时间:2014-06-04 17:56:00    阅读次数:247
I Had All The Money To Buy Those Bags
Solon and author of the carriages, the head of a young evident in the creation of mankind. Sales of plots awing programs and has only grow. In mid-196...
分类:其他好文   时间:2014-06-03 15:40:10    阅读次数:485
设计模式总结篇系列:组合模式(Composite)
在探讨Java组合模式之前,先要明白几个概念的区别:继承、组合和聚合。继承是is-a的关系。组合和聚合有点像,有些书上没有作区分,都称之为has-a,有些书上对其进行了较为严格区分,组合是contains-a关系,聚合是has-a关系。组合方式中被组合的对象生命周期不能超过整体,一般写代码时是直接在...
分类:其他好文   时间:2014-06-02 12:52:24    阅读次数:224
[Ruby] Ruby Variable Scope
Scope defines where in a program a variable is accessible. Ruby has four types of variable scope, local, global, instance and class....
分类:其他好文   时间:2014-06-02 10:37:39    阅读次数:241
汇编-memcpy的实现
memcpystack proc dest,src,cnt ;cnt is a count of dwords ;this function has a granularity of dwords mov edx,src mov eax,dest sub eax...
分类:其他好文   时间:2014-06-02 08:31:34    阅读次数:432
leetcode Linked List Cycle
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?求链表是否有环的问题,要考虑链表为空的情况,定义一个快指针和一个慢指针,如果快指针和...
分类:其他好文   时间:2014-06-02 08:05:16    阅读次数:255
4.2 THE COMPLETENESS THEOREM: (2) If A theory $\mathbf{T}$ has a model, then it is consistent.
4.2 THE COMPLETENESS THEOREM(2) If A theory $\mathbf{T}$ has a model, then it is consistent.ProofSuppose that $\mathbf{T}$ has a mode $\mathbf{\alpha}...
分类:其他好文   时间:2014-06-02 06:23:48    阅读次数:189
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