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How to create and handle composite primary key in JPA
I want to have versions from the same data entry. In other words, I want to duplicate the entry with another version number.
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How do I get out of a screen without typing 'exit'?
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Ctrl-A -> Ctrl-D just exits from the session for me, leaving it running in the background. Ctrl-A -> \ will exit the session completely (on Oracle Linux 6).
– Andrew Brennan
Apr 1 '19 at 16:03
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How to truncate a foreign key constrained table?
...able foreign key before truncate is also a good way, i did it with success from source: stackoverflow.com/questions/8641703/…
– Dung
Jun 4 '16 at 3:32
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Unsigned keyword in C++
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From the link above:
Several of these types can be modified using the keywords signed, unsigned, short, and long. When one of these type modifiers is used by itself, a data type of int is assumed
This means that you can...
External template in Underscore
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@TommiForsström I agree. I've moved away from this approach. Wow! Dec 4, 2011 is a really long time ago in the world of Backbone.js development :)
– Brian Genisio
Jan 14 '13 at 15:49
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Change font color for comments in vim
...kground setting:
set background=dark
would change the color of comments from dark blue to light blue, when using the default colorscheme.
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Is there a function that returns the current class/method name? [duplicate]
...n is expensive and is sometimes unnecessary. The question typically stems from an aversion to hard-coding the name - despite actually knowing it. But you can let the compiler handle it by using nameof(<MethodNameHere>) in place of the string. True, it doesn't save you from copy/paste errors...
Check for array not empty: any?
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>> [nil, 1].any?
=> true
>> [nil, nil].any?
=> false
From the documentation:
If the block is not given, Ruby adds
an implicit block of {|obj| obj} (that
is any? will return true if at least
one of the collection members is not
false or nil).
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Set the table column width constant regardless of the amount of text in its cells?
...is useful to set the overflow property to hidden to prevent any extra text from coming out of the table.
You should make sure to leave all of the bordering and sizing for CSS, too.
Ok so here's what I have:
table {
border: 1px solid black;
table-layout: fixed;
width: 200px;
}
th,...
What is __declspec and when do I need to use it?
...t), which instruct the linker to import and export (respectively) a symbol from or to a DLL.
// header
__declspec(dllimport) void foo();
// code - this calls foo() somewhere in a DLL
foo();
(__declspec(..) just wraps up Microsoft's specific stuff - to achieve compatibility, one would usually wr...