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Java generics T vs Object
... is that with generic methods I don't need to cast and I get a compilation error when I do wrong:
public class App {
public static void main(String[] args) {
String s = process("vv");
String b = process(new Object()); // Compilation error
}
public static <T> T p...
Why does Math.Round(2.5) return 2 instead of 3?
...alled rounding to nearest,
or banker's rounding. It minimizes
rounding errors that result from
consistently rounding a midpoint value
in a single direction.
You can specify how Math.Round should round mid-points using an overload which takes a MidpointRounding value. There's one overload w...
How to get response status code from jQuery.ajax?
... I quote the notice on jquery website here:
The jqXHR.success(), jqXHR.error(), and jqXHR.complete() callbacks are deprecated as of jQuery 1.8. To prepare your code for their eventual removal, use jqXHR.done(), jqXHR.fail(), and jqXHR.always() instead.
To know the status code of a ajax respons...
How should I write tests for Forms in Django?
...
This is how you check for a specific form error: self.assertEquals(form.errors['recipient'], [u"That recipient isn't valid"])
– Emil Stenström
Jun 30 '14 at 14:54
...
Commands out of sync; you can't run this command now
...execute my PHP code, which calls two MySQL queries via mysqli, and get the error "Commands out of sync; you can't run this command now".
...
ImportError: No module named six
... trying to build OpenERP project, done with dependencies. It's giving this error now
7 Answers
...
Detect when an image fails to load in Javascript
...) {
var tester=new Image();
tester.onload=imageFound;
tester.onerror=imageNotFound;
tester.src=URL;
}
function imageFound() {
alert('That image is found and loaded');
}
function imageNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
...
Is there any way to ignore INSTALL_FAILED_VERSION_DOWNGRADE on application install with the Android
It seems like the most recent Android 4.2 has introduced this error condition on installation when one attempts to install an APK with a lower version. In prior versions of Android, one would be able to install older APK's simply via adb install -r <link to APK> . For debugging purposes, I f...
Passing an array to a query using a WHERE clause
... must be at least one value inside the parenthesis or MySQL will return an error; this equates to making sure that our input array has at least one value. To help prevent against SQL injection attacks, first generate a ? for each input item to create a parameterized query. Here I assume that the arr...
How to use ELMAH to manually log errors
... since ELMAH 1.0:
try
{
some code
}
catch(Exception ex)
{
Elmah.ErrorLog.GetDefault(HttpContext.Current).Log(new Elmah.Error(ex));
}
ELMAH 1.2 introduces a more flexible API:
try
{
some code
}
catch(Exception ex)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}
There i...