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PEEID=$(sudo pgrep -u root ) && for device in `sudo lsof -anP -i -u root | grep ':9814' | awk '{print $6}'` ; do echo "${device} time" ; sudo find /pr 阅读全文
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背景 SSL及CA证书机制是浏览器时代的产物，SSL通信的双方，一方为遍布全球的互联网用户，另一方为百花齐放的各种服务，双方不知道不信任对方，不得不采用CA形式来确保安全。 随时代发展很多embeded设备接入互联网，这里相对典型场景有较大差别：首先，embedded device受较低的硬件规格所 阅读全文
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Only one AsyncAnnotationBeanPostProcessor may exist within the context 出现该错误可能有多种原因，解决很简单： mvn clean 检查CLASSPATH是否有多余的配置也是一个办法。 阅读全文
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nginx从1.9.0开始，新增加了一个stream模块，用来实现四层协议的转发或负载均衡。This module is not built by default, it should be enabled with the --with-stream configuration parameter 阅读全文
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The thing about collations is that although database have it's own collation, every table, and every column can have it's own collation. If not specif 阅读全文
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The current information explosion has resulted in an increasing number of applications that need to deal with large volumes of data. While many of the 阅读全文
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Chapter 1 Official Steps We are going to follow the steps here, http://logging.apache.org/log4cxx/building/vstudio.html. However, we must make changes 阅读全文
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Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that there will be on... 阅读全文
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Total Accepted:43584Total Submissions:284350Difficulty:MediumGiven a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is ca... 阅读全文
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messaging server is often used to implement processing of background jobs or other kinds of messaging tasks. A simple form of queue is often obtained 阅读全文
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Something you need to perform after RedHat6.x installedYUM Repos% yum update% rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-releas... 阅读全文
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ElasticSearch是一个开源的分布式搜索引擎，具备高可靠性，支持非常多的企业级搜索用例。像Solr4一样，是基于Lucene构建的。支持时间时间索引和全文检索。官网：http://www.elasticsearch.org它对外提供一系列基于 JAVA python .net js和 HTT... 阅读全文
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About SQLiteSee Also...FeaturesWhen to use SQLiteFrequently Asked QuestionsWell-known UsersBooks About SQLiteGetting StartedSQL SyntaxPragmasSQL funct... 阅读全文
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编程有时需要使用定长的容器（fixed size container）。实现旋转容器可以像下面这样：std::vector vec(size);vec[i % size] = newelem;但boost的circular_buffer提供更多功能，我们不需要重复造轮子了（DRY）：#include... 阅读全文
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You Only Need To Note This: only 1 single thread can acquire an upgrade_lock at one time. others are very straightforward. 96 vote 1800 INFORMATION is 阅读全文
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唯一路径问题II Unique Paths II Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An 阅读全文
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如何在JAVA中实现一个固定最大size的hashMap利用LinkedHashMap的removeEldestEntry方法，重载此方法使得这个map可以增长到最大size，之后每插入一条新的记录就会删除一条最老的记录。import java.util.LinkedHashMap;import j... 阅读全文
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Populating Next Right Pointers in Each NodeGiven a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLi... 阅读全文
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Binary Tree Preorder Traversal Binary Tree Preorder Traversal Given a binary tree, return the preorder traversal of its nodes' values. For example:Giv 阅读全文
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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? # Definition for singl 阅读全文