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MyBatis学习总结(四)——解决字段名与实体类属性名不相同的冲突
在平时的开发中,我们表中的字段名和表对应实体类的属性名称不一定都是完全相同的,下面来演示一下这种情况下的如何解决字段名与实体类属性名不相同的冲突。一、准备演示需要使用的表和数据CREATE TABLE orders( order_id INT PRIMARY KEY AUTO_INCREM...
分类:其他好文   时间:2015-01-31 19:22:07    阅读次数:192
Partition List
Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in each of...
分类:其他好文   时间:2015-01-31 17:59:32    阅读次数:180
SQL(oracle) 取得分组后最大值记录
select * from? (select t.*, row_number() over(partition by 分组字段 order by 排序字段 desc ) rn from tablename t ) where rn=1 select * ? from (select t.*, ? ? ? ? ? ? ? ?row_number() over...
分类:数据库   时间:2015-01-31 14:52:59    阅读次数:127
UPDATE...WHERE...ORDER BY...LIMIT语句
在MySQL中尽量少使用UPDATE ...WHERE ...ORDER BY ...LIMIT语句,原因是MySQL会对where条件匹配的所有记录加上X锁,如果多个线程同事执行这条语句,就会有非常大的概率发生死锁,而且MySQL服务器不能自动的去解除这种死锁。 下面的例子证实了这一点,先创建一张record表,再插入几条记录 mysql> create table record(...
分类:其他好文   时间:2015-01-31 14:51:28    阅读次数:145
35.Search Insert Position
Given a sorted array and a target value, return the index if the target isfound. If not, return the index where it would be if it were inserted in order. You may assume no duplicates in the array. H...
分类:其他好文   时间:2015-01-31 12:51:27    阅读次数:98
Sort Colors
题目: Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the ...
分类:其他好文   时间:2015-01-31 12:46:38    阅读次数:131
LeetCode --- 20. Valid Parentheses
题目链接:Valid Parentheses Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "...
分类:其他好文   时间:2015-01-30 22:40:16    阅读次数:227
Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 解题思路:采用中序排列的方法递归地决定每个结点的数值; #include #include #include using namespace std; //Definition...
分类:其他好文   时间:2015-01-30 16:00:24    阅读次数:131
Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...
分类:其他好文   时间:2015-01-30 15:55:05    阅读次数:196
隐马尔可夫模型实战
1.17-18:学习HMM模型;1.18-20:学习CRF模型(未完成);1.20-24:应用HMM到具体问题;1.24-27:扩展为second-order HMM(扩展Bi-gram MLE到Tri-gram MLE;扩展Viterbi算法);明确了BW算法不适合正在解决的问题;1.28:在词性...
分类:其他好文   时间:2015-01-30 15:36:58    阅读次数:175
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