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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 .
...
TypeScript “this” scoping issue when called in jquery callback
...ance trade-off compared to the first method
Good: In TypeScript, this has 100% type safety
Good: Works in ECMAScript 3
Good: You only have to type the instance name once
Bad: You'll have to type the parameters twice
Bad: Doesn't work with variadic parameters
...
Python - Check If Word Is In A String
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360
What is wrong with:
if word in mystring:
print 'success'
...
How to create an installer for a .net Windows Service using Visual Studio
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230
In the service project do the following:
In the solution explorer double click your services .c...
Tool to read and display Java .class versions
...s.java"
public class MyClass
SourceFile: "MyClass.java"
minor version: 0
major version: 46
...
To only show the version:
WINDOWS> javap -verbose MyClass | find "version"
LINUX > javap -verbose MyClass | grep version
...
What is hashCode used for? Is it unique?
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109
MSDN says:
A hash code is a numeric value that is used to identify an object
during equal...
Best approach for designing F# libraries for use from both F# and C#
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40
Daniel already explained how to define a C#-friendly version of the F# function that you wrote, ...
For each row in an R dataframe
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105
You can try this, using apply() function
> d
name plate value1 value2
1 A P1 1...
Android emulator shows nothing except black screen and adb devices shows “device offline”
...e Host GPU" does only work for me with Android 4.2 as "Target".
Update 26.02.2014:
There a two hints in the Configuring Graphics Acceleration chapter from developer.android.com.
Caution: As of SDK Tools Revision 17, the graphics acceleration feature for the emulator is experimental; be alert f...