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Update or Insert (multiple rows and columns) from subquery in PostgreSQL
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176
For the UPDATE
Use:
UPDATE table1
SET col1 = othertable.col2,
col2 = othertable.c...
Can I use multiple “with”?
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answered Mar 21 '11 at 9:21
Tomek SzpakowiczTomek Szpakowicz
11.3k22 gold badges3030 silver badges5454 bronze badges
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Detecting iOS / Android Operating system
...oid";
}
// iOS detection from: http://stackoverflow.com/a/9039885/177710
if (/iPad|iPhone|iPod/.test(userAgent) && !window.MSStream) {
return "iOS";
}
return "unknown";
}
share
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C#: List All Classes in Assembly
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153
Use Assembly.GetTypes. For example:
Assembly mscorlib = typeof(string).Assembly;
foreach (Typ...
warning: implicit declaration of function
... a declaration ("prototype") yet.
For example:
int main()
{
fun(2, "21"); /* The compiler has not seen the declaration. */
return 0;
}
int fun(int x, char *p)
{
/* ... */
}
You need to declare your function before main, like this, either directly or in a header:
int fun(int ...
What is pseudopolynomial time? How does it differ from polynomial time?
...hms that run in pseudopolynomial time have runtimes like O(nW) (for the 0/1 Knapsack Problem ) or O(√n) (for trial division ); why doesn't that count as polynomial time?
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How do I show a MySQL warning that just happened?
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answered Aug 1 '09 at 3:22
zombatzombat
84.7k2121 gold badges148148 silver badges160160 bronze badges
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Django database query: How to get object by id?
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186
If you want to get an object, using get() is more straightforward:
obj = Class.objects.get(pk...
Why can I create a class named “var”?
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101
var is not a keyword according to this list.
it is a contextual keyword, so from the context ...
Access “this” from Java anonymous class
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answered Jul 5 '09 at 14:07
Mykola GolubyevMykola Golubyev
50k1414 gold badges7979 silver badges100100 bronze badges
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