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Efficient SQL test query or validation query that will work across all (or most) databases
...ir SQL connections for idleness. For example, the JDBC pooling library c3p0 has a property called preferredTestQuery , which gets executed on the connection at configured intervals. Similarly, Apache Commons DBCP has validationQuery .
...
Macro vs Function in C
...ategy for fixing this is to put the statements inside a "do { ... } while (0)" loop.
If you have two structures that happen to contain a field with the same name but different semantics, the same macro might work on both, with strange results:
struct shirt
{
int numButtons;
};
struct webpage...
Jasmine JavaScript Testing - toBe vs toEqual
...
504
For primitive types (e.g. numbers, booleans, strings, etc.), there is no difference between toB...
How do I pass multiple parameters into a function in PowerShell?
...ses are entirely unneccessary and will cause a parse error in PowerShell 2.0 (or later) if Set-StrictMode is active. Parenthesised arguments are used in .NET methods only.
function foo($a, $b, $c) {
"a: $a; b: $b; c: $c"
}
ps> foo 1 2 3
a: 1; b: 2; c: 3
...
How to calculate number of days between two given dates?
If I have two dates (ex. '8/18/2008' and '9/26/2008' ), what is the best way to get the number of days between these two dates?
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Alarm Manager Example
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This is working code. It wakes CPU every 10 minutes until the phone turns off.
Add to Manifest.xml:
...
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
...
<receiver android:process=":remote" android:name=".Alarm">&...
How to avoid using Select in Excel VBA
...t rng = Range("NamedRange")
or a multi-cell range
Set rng = Range("A1:B10")
Set rng = Range("A1", "B10")
Set rng = Range(Cells(1,1), Cells(10,2))
Set rng = Range("AnotherNamedRange")
Set rng = Range("A1").Resize(10,2)
You can use the shortcut to the Evaluate method, but this is less efficient a...
Using Enums while parsing JSON with GSON
...m.out.println(element.delimiter);
System.out.println(element.scope.get(0));
}
}
class AttributeScopeDeserializer implements JsonDeserializer<AttributeScope>
{
@Override
public AttributeScope deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws...
Can I use a binary literal in C or C++?
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70
You can use BOOST_BINARY while waiting for C++0x. :) BOOST_BINARY arguably has an advantage ove...
Draw text in OpenGL ES
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103
The Android SDK doesn't come with any easy way to draw text on OpenGL views. Leaving you with t...