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how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...n that thinking.
There's an example of this in the documentation: http://www.postgresql.org/docs/9.3/static/plpgsql-control-structures.html, example 40-2 right at the bottom.
That's usually the easiest way. You can do some magic with rules, but it's likely going to be a lot messier. I'd recommend...
Is errno thread-safe?
... is thread-specific. POSIX requires that errno be threadsafe.
See http://www.unix.org/whitepapers/reentrant.html
In POSIX.1, errno is defined as an
external global variable. But this
definition is unacceptable in a
multithreaded environment, because its
use can result in nondeterminist...
How do I replace NA values with zeros in an R dataframe?
...the mutate and summarize _at and _all function variants can be found here: https://rdrr.io/cran/dplyr/man/summarise_all.html
Additionally, I found helpful demonstrations and collections of examples here: https://blog.exploratory.io/dplyr-0-5-is-awesome-heres-why-be095fd4eb8a
Attributions and Apprec...
How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved
...b-app
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!-- Config here. -->
</web-app>
See...
vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...备工作】：
（1）Boost 下载可以到官方网站下载：
http://www.boost.org/
（2）安装VS2008 IDE
【Setp2 编译Boost】
1.打开Visual Studio 2008 命令提示窗口
2.进入D:\05_Computer\04_3rdPatry\02Boost\boost_1_44_0\boost_1_44_0\tools\jam\src
3.执行 build.bat 会...
Hibernate: hbm2ddl.auto=update in production?
... append to it and let liquibase take over managing schema changes.
http://www.liquibase.org/
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Do checkbox inputs only post data if they're checked?
...TML 4 spec, which should be consistent across almost all browsers:
http://www.w3.org/TR/html401/interact/forms.html#checkbox
Checkboxes (and radio buttons) are on/off switches that may be toggled
by the user. A switch is "on" when the control element's checked
attribute is set. When a form ...
Handling an empty UITableView. Print a friendly message
...troller: self)
return 0
}
}
With a little help from http://www.appcoda.com/pull-to-refresh-uitableview-empty/
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How to call a stored procedure from Java and JPA
...", so it is specific to Eclipselink implementation.
I found it at "http://www.yenlo.nl/en/calling-oracle-stored-procedures-from-eclipselink-with-multiple-out-parameters".
StoredProcedureCall storedProcedureCall = new StoredProcedureCall();
storedProcedureCall.setProcedureName("mypackage.myprocedur...
How do you convert Html to plain text?
...fo:
http://weblogs.asp.net/rosherove/archive/2003/05/13/6963.aspx
http://www.google.com/search?hl=en&q=html+tag+stripping+&btnG=Search
If you need the more complex behaviour of a CFG I would suggest using a third party tool, unfortunately I don't know of a good one to recommend.
...