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Can table columns with a Foreign Key be NULL?
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251
Yes, you can enforce the constraint only when the value is not NULL. This can be easily tested...
Is it possible to use Java 8 for Android development?
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26 Answers
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How to set JFrame to appear centered, regardless of monitor resolution? [closed]
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236
I always did it in this way:
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
thi...
Can I start the iPhone simulator without “Build and Run”?
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260
The simulator is just an application, and as such you can run it like any other application.
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How often does python flush to a file?
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edited Sep 6 '18 at 22:12
zyxue
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answered J...
Redefining NULL
...sting a 0 constant to a pointer value must result in a NULL pointer (§6.3.2.3/3), and evaluating the null pointer as a boolean must be false. This can be a bit awkward if you really do want a zero address, and NULL is not the zero address.
Nevertheless, with (heavy) modifications to the compiler a...
How to center horizontally div inside parent div
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answered Dec 23 '09 at 11:39
Mark EmblingMark Embling
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Print commit message of a given commit in git
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edited Jul 28 '10 at 20:53
answered Jul 28 '10 at 20:47
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Cross compile Go on OSX?
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162
With Go 1.5 they seem to have improved the cross compilation process, meaning it is built in now...
How do I center align horizontal menu?
...tion:none;
margin:10px;
background:red;
float:left;
border:2px outset blue;
color:#fff;
padding:2px 5px;
text-align:center;
white-space:nowrap;
}
#buttons a:hover{ border:2px inset blue;color:red;background:#f2f2f2;}
#content{overflow:hidden}/* hide horizontal scrollb...