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Is it faster to count down than it is to count up?
... range of the numbers you're using: with the incrementing loop you have to test i<N each time round the loop. For the decrementing version, the carry flag (set as a side effect of the subtraction) may automatically tell you if i>=0. That saves a test per time round the loop.
In reality, on mo...
What is a stack trace, and how can I use it to debug my application errors?
...bility to manipulate stack trace information.
Standard behavior:
package test.stack.trace;
public class SomeClass {
public void methodA() {
methodB();
}
public void methodB() {
methodC();
}
public void methodC() {
throw new RuntimeException();
}
...
How to randomize (or permute) a dataframe rowwise and columnwise?
... also use the randomizeMatrix function in the R package picante
example:
test <- matrix(c(1,1,0,1,0,1,0,0,1,0,0,1,0,1,0,0),nrow=4,ncol=4)
> test
[,1] [,2] [,3] [,4]
[1,] 1 0 1 0
[2,] 1 1 0 1
[3,] 0 0 0 0
[4,] 1 0 1 0
randomizeMatrix(test,...
Why is there a difference in checking null against a value in VB.NET and C#?
...e by an unfortunate belief that it is confusing to have different means of testing equality yield different results, and such confusion might be avoided by having the different forms of equality yield the same results whenever possible.
In reality, the fundamental cause of confusion is a misguided ...
Debug code-first Entity Framework migration codes
... hit a break point in a db migration set the context to MigrateDatabaseToLatestVersion on initialise.
Database.SetInitializer(new MigrateDatabaseToLatestVersion<EnterContextHere, Configuration>());
Then you just debug as normal (run using f5) and the breakpoint will hit the first time you r...
How to get the filename without the extension in Java?
...
The easiest way is to use a regular expression.
fileNameWithOutExt = "test.xml".replaceFirst("[.][^.]+$", "");
The above expression will remove the last dot followed by one or more characters. Here's a basic unit test.
public void testRegex() {
assertEquals("test", "test.xml".replaceFir...
How to write a JSON file in C#?
...ere's a feature comparison between common serialisers as well as benchmark tests .
Below is a graph of performance taken from the linked article:
This separate post, states that:
Json.NET has always been memory efficient, streaming the reading and writing large documents rather than lo...
How do I check if the mouse is over an element in jQuery?
...You can also use this answer : https://stackoverflow.com/a/6035278/8843 to test if the mouse is hover an element :
$('#test').click(function() {
if ($('#hello').is(':hover')) {
alert('hello');
}
});
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...
How do I get the name of the current executable in C#?
...
AppDomain can be a EXE application, Web application, Unit test application, Addin Visual Studio, and "Silverlight App"(?). Maybe interesting full solution for all cases. For example, for Unit Test VS2012 - ProcessName: vstest.executionengine.x86 MainModule.FileName: C...
What is the best way to clone/deep copy a .NET generic Dictionary?
... entry => (T) entry.Value.Clone());
(Those are untested, but should work.)
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