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How to round an average to 2 decimal places in PostgreSQL?
...r, @Catcall and the PostgreSQL team agree about "pg's historic rationale".
PS: another point about rounding is accuracy, check @IanKenney's answer.
Overloading as casting strategy
You can overload the ROUND function with,
CREATE FUNCTION ROUND(float,int) RETURNS NUMERIC AS $$
SELECT ROUND($1::...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...放开（验证过，没用，还是一样报错）
不使用d8，用老版本的dex试试（不好恢复老版本不验证了）
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怀疑 kawa Scheme 生成问题，更新新版本试试。（也不容易更新）
https://community.appinventor.mi ... or-d8-failed/141334
Export query result to .csv file in SQL Server 2008
...ons. For example all the NULLs show in output files as "NULL", etc. Perhaps there is a way to set this that I don't know about, however.
– Noah
Sep 6 '13 at 7:36
14
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Is it possible to start a shell session in a running container (without ssh)
...lxc-attach -n <ID>
Note that the id needs to be the full one (docker ps -notrunc).
However, I strongly recommend against this.
notice: -notrunc is deprecated, it will be replaced by --no-trunc soon.
share
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...drbd-8.4.6.tar.gz
drbd-utils-8.9.3.tar.gz （注意：drbd和drbd-utils的版本要对应起来）
2.2安装操作系统，配置IP地址，关闭防火墙，selinux 关闭NetworkManager，修改/etc/hosts,配置YUM (三台机器都需要操作)
2.2.1安装操作系统
省略
2.2...
Peak detection in a 2D array
...lue, filter overlapping squares
def drop_overlapping(pairs):
no_overlaps = []
def does_not_overlap(p1, p2):
i1, i2 = p1[0], p2[0]
r1, col1 = i1 / (width-1), i1 % (width-1)
r2, col2 = i2 / (width-1), i2 % (width-1)
return (max(abs(r1-r2),abs(col1-col2)) >= ...
How can I escape a double quote inside double quotes?
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+1 because it solved a problem of adding a PS1 variable to ~/.profile echo 'export PS1='\[\033[00;31m\]${?##0}$([ $? -ne 0 ] && echo \x22 \x22)\[\033[00;32m\]\u\[\033[00m\]@\[\033[00;36m\]\h\[\033[00m\][\[\033[01;33m\]\d \t\[\033[00m\]] \[\033[01;34m\]\w\n\[...
新浪是如何分析处理32亿条实时日志的？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...闭swap，调整max open files等；App Level的优化如Java运行环境版本的选择，ES_HEAP_SIZE的设置，修改bulk index的queue size等，另外还设置了默认的index template，目的是更改默认的shard，replica数并将string改为not_analyzed，开启doc_values以应对elasti...
Possible to change where Android Virtual Devices are saved?
I've set up the Android SDK and Eclipse on my machine running Windows XP and AVDs (Android Virtual Devices) are saved to "Documents and Settings\ user \.android" by default. Is there any way to change this behavior? I have all of the other components saved in a directory on a separate partition an...
How to increase font size in a plot in R?
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Thanks! What is the difference with "ps=1.5"?
– Tim
Nov 22 '10 at 2:44
5
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