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Hive中实现group concat功能(不用udf)
Hive中实现group concat功能(不用udf)Sql代码 hive> desc t; OK id string str string Time taken: 0.249 seconds hive> select * from t; OK 1 A 1 B 2 C 2...
分类:其他好文   时间:2014-11-11 15:47:06    阅读次数:164
(转)如何分析解决Android ANR
一:什么是ANRANR:Application Not Responding,即应用无响应二:ANR的类型ANR一般有三种类型:1:KeyDispatchTimeout(5 seconds) --主要类型按键或触摸事件在特定时间内无响应2:BroadcastTimeout(10 seconds)Br...
分类:移动开发   时间:2014-11-10 11:25:37    阅读次数:183
信号处理篇alarm ferror kill mkfifo pause pclose perror pipe popen sigaction sigaddset sigdelset sigemptyset signal sleep strerror
alarm(设置信号传送闹钟)相关函数signal,sleep表头文件#include定义函数unsigned int alarm(unsigned int seconds);函数说明alarm()用来设置信号SIGALRM在经过参数seconds指定的秒数后传送给目前的进程。如果参数second....
分类:其他好文   时间:2014-11-10 06:25:42    阅读次数:291
ZOJ3765---Lights (Splay伸展树)
LightsTime Limit:8 Seconds Memory Limit:131072 KBNow you haveNlights in a line. Don't worry - the lights don't have color. The only status they have i...
分类:其他好文   时间:2014-11-08 13:14:54    阅读次数:233
zoj 3497 Mistwald
Mistwald Time Limit: 2 Seconds      Memory Limit: 65536 KB In chapter 4 of the game Trails in the Sky SC, Estelle Bright and her friends are crossing Mistwald to meet their final enemy, Lucciola...
分类:其他好文   时间:2014-11-07 20:56:09    阅读次数:225
Hive编程指南学习笔记(1)
hive一次使用命令: $ hive -e "select * from mytable limit 1;" OK name1 1 name2 2 Time taken: 3.935 seconds $ hive -e "select * from mytable limit 1;" > /tmp/myfile $ cat /tmp/myfile OK name1 1 name...
分类:其他好文   时间:2014-11-07 20:55:48    阅读次数:279
CentOS 6.5安装MongoDB 2.6(多yum数据源)
Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds' 数据源在国内访问网速过慢,可参考以下数据源: http://mongo.a.mesa.io/repo/redhat/os/x86_64/ http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/ http://repo.mongodb.org/repo/redhat/os/x86_64...
分类:数据库   时间:2014-11-06 21:54:25    阅读次数:290
C/C++嵌入式开发面试题
C/C++嵌入式开发面试题预处理器(Preprocessor)1. 用预处理指令#define 声明一个常数,用以表明1年中有多少秒(忽略闰年问题)#define SECONDS_PER_YEAR (60 * 60 * 24 * 365)UL 我在这想看到几件事情: 1). #define 语...
分类:编程语言   时间:2014-11-06 14:20:33    阅读次数:193
zoj 3640 Help Me Escape (概率dp 递归求期望)
题目链接Help Me EscapeTime Limit:2 Seconds Memory Limit:32768 KBBackgroundIf thou doest well, shalt thou not be accepted? and if thou doest not well, sin ...
分类:其他好文   时间:2014-11-05 22:59:07    阅读次数:179
eclipse中如何设置tomcat启动时间
现象:在eclipse中启动tomcat总是提示“Server Tomcat v5.5 Server @ localhost was unable to start within 45 seconds. If the server requires more time, try increasing...
分类:系统相关   时间:2014-11-05 10:41:37    阅读次数:197
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