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HBase数据模型
HBase以表的形式存储数据。表由行和列族组成。列划分为若干个列族(row family),其逻辑视图如下:下面分别说说几个关键概念:1.行键(RowKey) 行键是字节数组, 任何字符串都可以作为行键; 表中的行根据行键进行排序,数据按照Row key的字节序(byte order)排序存储;.....
分类:其他好文   时间:2015-04-16 01:13:28    阅读次数:176
[LeetCode] Add Two Numbers
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 ...
分类:其他好文   时间:2015-04-15 13:39:11    阅读次数:164
2. Add Two Numbers
题目: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 sing...
分类:其他好文   时间:2015-04-15 12:53:30    阅读次数:206
leetcode || 90、Subsets II
problem: Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set mu...
分类:其他好文   时间:2015-04-15 11:29:03    阅读次数:211
SQL-MICK基础
/*Select语句完整的执行顺序:1、from子句组装来自不同数据源的数据;2、where子句基于指定的条件对记录行进行筛选;3、group by子句将数据划分为多个分组;4、使用聚集函数进行计算;5、使用having子句筛选分组;6、计算所有的表达式;7、使用order by对结果集进行排序。8...
分类:数据库   时间:2015-04-15 00:54:05    阅读次数:220
LeetCode Subsets II
Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not contain dupli...
分类:其他好文   时间:2015-04-14 23:20:22    阅读次数:207
[LeetCode]Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 这道题要求根据一个有序的数组建立一棵二叉排序树。利用折半的思想,构造根节点,再递归构造左右子树。递归出口是数组中只含一个元素。TreeNode *sortedArrayToBST(vector &...
分类:其他好文   时间:2015-04-14 21:34:22    阅读次数:98
leetcode || 86、Partition List
problem: 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...
分类:其他好文   时间:2015-04-14 19:45:50    阅读次数:149
WebApplicationInitializer
/** * Interface to be implemented in Servlet 3.0+ environments in order to configure the * {@link ServletContext} programmatically -- as opposed to (o...
分类:移动开发   时间:2015-04-14 16:02:45    阅读次数:225
05-SQLite之order by对结果集进行排序
一、order by语句概述 order by语句用于根据指定的列对结果集进行排序。 order by 语句默认按照升序对记录进行排序。 如果您希望按照降序对记录进行排序,可以使用 desc 关键字 二、以字母顺序显示name 语法:select * from persons order by name; 三、以字母顺序显示name,并以数字顺序显示i...
分类:数据库   时间:2015-04-14 12:56:43    阅读次数:262
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