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@Basic(optional = false) vs @Column(nullable = false) in JPA
... the specification and read up about it.
Here is what the spec has to say:
http://download.oracle.com/otndocs/jcp/persistence-2.0-fr-oth-JSpec/
Basic(optional): Whether the value of the field or property may be
null. This is a hint and is disregarded for primitive types; it may be
used in sc...
How many files can I put in a directory?
...tion to this speed problem. I wrote a pretty detailed article about it at: http://www.olark.com/spw/2011/08/you-can-list-a-directory-with-8-million-files-but-not-with-ls/
The key take away is: use getdents() directly -- http://www.kernel.org/doc/man-pages/online/pages/man2/getdents.2.html rather th...
What is the dual table in Oracle?
...ystem function in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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When does Java's Thread.sleep throw InterruptedException?
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From Don't swallow interrupts
See the entire paper here:
http://www.ibm.com/developerworks/java/library/j-jtp05236/index.html?ca=drs-
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Change File Extension Using C#
... = Path.ChangeExtension(myfile,".blah")
You should look this post too:
http://msdn.microsoft.com/en-us/library/system.io.path.changeextension.aspx
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Rails 3 datatypes?
...nto a column.
I hope that helps someone! Also, here's the official list: http://guides.rubyonrails.org/migrations.html#supported-types
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How to get a complete list of object's methods and attributes?
...
That is why the new __dir__() method has been added in python 2.6
see:
http://docs.python.org/whatsnew/2.6.html#other-language-changes (scroll down a little bit)
http://bugs.python.org/issue1591665
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How do I get an HttpContext object from HttpContextBase in ASP.NET MVC 1?
...g with some WebForms/MVC-agnostic tools, and I need to get an instance of HttpContext given a reference to an HttpContextBase object. I can't use HttpContext.Current because I need this to work asynchronously as well ( HttpContext.Current returns null during an asynchronous request). I'm aw...
Eclipse: Referencing log4j.dtd in log4j.xml
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<!DOCTYPE log4j:configuration PUBLIC
"-//APACHE//DTD LOG4J 1.2//EN" "http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd">
It is similar to @FrVaBe's response, but on the plus side, does not require any further Eclipse configuration (i.e., if you're sharin...
Automatically start forever (node) on system restart
...ul stop. This script provisions the logrotate script as well.
Github url: https://github.com/zapty/forever-service
NOTE: I am the author of forever-service.
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