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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
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Thanks! So if I want my JPA persistence not to be tied to the Hibernate implementation (i.e. change to EJB3) then I have to use both annotations (to prohibit null in both the field and its column)?
– rapt
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deny direct access to a folder and file by htaccess
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I would just move the includes folder out of the web-root, but if you want to block direct access to the whole includes folder, you can put a .htaccess file in that folder that contains just:
deny from all
That way you cannot open any file from that folder, but you can include them in...
Make a negative number positive
...l and do it yourself:
number = (number < 0 ? -number : number);
or
if (number < 0)
number = -number;
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What is wrong with using goto? [duplicate]
I was ramdomming through xkcd and saw this one (if also read some negative texts about them some years ago):
What is actually wrong with it? Why are goto's even possible in C++ then?
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Equivalent of Math.Min & Math.Max for Dates?
...ty, that is not retained in the new value. This is normally not a problem; if you compare DateTime values of different kinds the comparison doesn't make sense anyway.)
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How do you loop through currently loaded assemblies?
...t a "diagnostics" page in my ASP.NET application which does things like verify the database connection(s), display the current appSettings and ConnectionStrings, etc. A section of this page displays the Assembly versions of important types used throughout, but I could not figure out how to effectiv...
Prevent user from seeing previously visited secured page after logout
...n an url-pattern of interest, for example *.jsp.
@WebFilter("*.jsp")
Or if you want to put this restriction on secured pages only, then you should specify an URL pattern which covers all those secured pages. For example, when they are all in the folder /app, then you need to specify the URL patte...
List all files and directories in a directory + subdirectories
...d directory contained in a directory and subdirectories of that directory. If I chose C:\ as the directory, the program would get every name of every file and folder on the hard drive that it had access to.
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Local and global temporary tables in SQL Server
What is the difference between local and global temporary tables in SQL Server?
7 Answers
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Running multiple commands in one line in shell
...ou are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used && cp /templates/apple /templates/inuse && rm /templates/apple
Or
cp /templates/apple /templates/used && mv /templates/apple /tem...