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【Oracle】使用bbed恢复delete的数据
表中的数据被delete之后并不会真正删除数据,而是打了一个删除标记,只要还没有被覆盖就可以恢复回来。 实验过程如下: SYS@ORCL>create table bbed_test(x varchar2(20));   Table created.   SYS@ORCL>insert into bbed_test values('BADLY9');   1 row created...
分类:数据库   时间:2014-06-22 22:06:59    阅读次数:330
【Leetcode】Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tree and sum...
分类:其他好文   时间:2014-06-22 20:59:24    阅读次数:227
LeetCode——Binary Tree Postorder Traversal
Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 2 / 3 return [3,2,1]. Note: Recursive solut...
分类:其他好文   时间:2014-06-22 20:58:01    阅读次数:157
删除Map中Value重复的记录,并且只保留Key最小的那条记录
介绍 晚上无聊的时候,我做了一个测试题,测试题的大体意思是:删除Map中Value重复的记录,并且只保留Key最小的那条记录。 例如: I have a map with duplicate values: ("A", "1"); ("B", "2"); ("C", "2"); ("D", "3"); ("E", "3"); I would like to the map to have: ("A", "1"); ("B", "2"); ...
分类:其他好文   时间:2014-06-22 20:30:10    阅读次数:175
【Oracle】使用bbed恢复update的数据
使用bbed不仅仅可以找回已经delete的数据还可以恢复update的数据,当然过程要比恢复delete的数据复杂一些。 实验过程如下: SYS@ORCL>create table bbed_test(x int,y varchar2(20));   Table created.   SYS@ORCL>insert into bbed_test values(1,'BADLY9');...
分类:数据库   时间:2014-06-22 18:25:30    阅读次数:409
【dataStructure】 Arrays and Java Source Review
According to the order of data structure book, Arrays should be introduced in the frist time. When reviewing the some information related to arrays, I feel shocked that many useful classes and methods...
分类:编程语言   时间:2014-06-22 18:13:18    阅读次数:316
【DataStructure】Some useful methods for arrays
Last night it took me about two hours to learn arrays. For the sake of less time, I did not put emphaises on the practice question, just now when reading the book, I found that some methods referred...
分类:其他好文   时间:2014-06-22 17:14:10    阅读次数:152
LeetCode——Binary Tree Preorder Traversal
Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 2 / 3 return [1,2,3]. Note: Recursive soluti...
分类:其他好文   时间:2014-06-22 16:37:51    阅读次数:168
leetcode - Unique Binary Search Trees II
题目:Unique Binary Search Trees IIGivenn, generate all structurally uniqueBST's(binary search trees) that store values 1...n.For example,Givenn= 3, your...
分类:其他好文   时间:2014-06-22 13:49:21    阅读次数:243
Spring3.0官网文档学习笔记(七)--3.4.2
3.4.2 依赖与配置的细节     3.4.2.1  Straight values (primitives, Strings, and so on)     JavaBeans PropertyEditors被用来转换这些value到实际的类型。? bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSourc...
分类:编程语言   时间:2014-06-22 06:40:17    阅读次数:359
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