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SQL select only rows with max value on a column [duplicate]
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Difference between staticmethod and classmethod
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Why use bzero over memset?
...s.
– PseudoPsyche
Jun 13 '13 at 21:37
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
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1、准备机器，IP分别设置为： 192.168.0.136、192.168.0.137、192.168.0.138。
2、分别在每台机器上建立mongodb分片对应测试文件夹。
#存放mongodb数据文件
mkdir -p /data/mongodbtest
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的...
Hibernate Annotations - Which is better, field or property access?
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edited Oct 18 '10 at 9:57
Hanno Fietz
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OpenLayers vs Google Maps? [closed]
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edited Jul 24 '17 at 9:46
iFez
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answered Aug 13 '09 at 15:53
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件，一共循环10次
第6行：创建一个test_1…10.txt文件
第7行：循环体结束
cd, mkdir, touch都是系统自带的程序，一般在/bin或者/usr/bin目录下。for, do, done是sh脚本语言的关键字。
shell和shell脚本的概念
shell是指一种应用程序，这个...
Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
... plyr, with the daply function, as shown here: https://stackoverflow.com/a/7020101/210673
library(plyr)
daply(tmp, .(x, y), function(x) x$z)
## y
## x a b c
## x 1 2 3
## y 3 3 2
Using matrix indexing:
This is kinda old school but is a nice demonstration of matrix indexing, which can be...
Share data between AngularJS controllers
...ould also be here: {{firstName}}
</div>
Demo: http://jsfiddle.net/27mk1n1o/
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JPA EntityManager: Why use persist() over merge()?
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Lubo
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answered Jul 1 '09 at 18:28
MikeMike
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