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哥德尔,图灵和康托尔
## 哥德尔编号一个形式系统仅是一系列公理和规则,比如用简单的英文来记录公理,“Number 0 exists”。但我们能否把自然数关联到公理和规则呢?我们知道,在计算机上一切都是数字。比如,字母 “N” 是78,字母 "u" 是 117,诸如此类。“Number”这个单词对于我们来讲,就像 781...
分类:其他好文   时间:2014-06-09 23:46:38    阅读次数:309
POJ 3615 Cow Hurdles.
Description Farmer John wants the cows to prepare for the county jumping competition, so Bessie and the gang are practicing jumping over hurdles. They are getting tired, though, so they want to be ...
分类:其他好文   时间:2014-06-08 15:55:10    阅读次数:199
ORACLE—003:Create之创建表前判断表是否存在
建表前如何判断表是否存在呢,因为table是不支持replace的。下面的sql能帮到你。create前先判断表是否存在。例如,如果存在则drop掉那个表。当然你也可以定义自己的操作。 declare v_cnt Number; begin select count(*) into v_cnt from user_tables where upper(table_name) ...
分类:数据库   时间:2014-06-08 15:42:00    阅读次数:329
[LeetCode] Palindrome Number [13]
题目: Determine whether an integer is a palindrome. Do this without extra space. 解题思路: 判断一个int型整数是不是回文数字,这个题也不难,依次取得数字最高位和最低位进行比较,就可以判断是不是回文数字。需要注意的是负数不是回文数字。 代码实现:...
分类:其他好文   时间:2014-06-08 15:35:48    阅读次数:375
字典树 Trie (HDU 1671)
Problem Description Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the phone catalogue listed these numbers: 1. Emergenc...
分类:其他好文   时间:2014-06-08 10:31:22    阅读次数:234
【LeetCode】Single Number (2 solutions)
Single NumberGiven an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runti...
分类:其他好文   时间:2014-06-07 23:44:39    阅读次数:302
Windows 7下解决: java.net.SocketException: No buffer space available (maximum connections reached?)
查了一大堆网上的资料全都没用,Google得知,是Windows 7 的socket泄漏 :https://supportkb.riverbed.com/support/index?page=content&id=S23580&actp=LIST_RECENT补丁下载地址: http://suppo...
分类:编程语言   时间:2014-06-07 22:19:32    阅读次数:857
extjs动态树 动态grid 动态列
由于项目需要做一个动态的extjs树、列等等,简而言之,就是一个都是动态的加载功能,自己琢磨了半天,查各种资料,弄了将近两个星期,终于做出来了首先,想看表结构,我的这个功能需要主从两张表来支持代码目录表:CREATE TABLE SYS_T01_CODECONTENT( ID NUMBER NOT ...
分类:Web程序   时间:2014-06-07 21:19:39    阅读次数:457
Algorithm | hash
A basic requirement is that the function should provide a uniform distribution of hash values. A non-uniform distribution increases the number of coll...
分类:其他好文   时间:2014-06-07 16:58:29    阅读次数:240
leetcode--Plus One
Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit is at...
分类:其他好文   时间:2014-06-07 16:56:28    阅读次数:188
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