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@selector() in Swift?
...mething cool here
}
otherwise you will get a "Unrecognised Selector" error at runtime.
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What's the difference between commit() and apply() in SharedPreferences
...nd apply() method from shared preference. When I use AVD 2.3 it shows no error, but when I run the code in AVD 2.1, apply() method shows error.
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Relative imports in Python 3
...)[0] returns empty string. This is why there's empty string literal in the error description:
SystemError: Parent module '' not loaded, cannot perform relative import
The relevant part of the CPython's PyImport_ImportModuleLevelObject function:
if (PyDict_GetItem(interp->modules, package) == ...
How should strace be used?
...see what your OS does. It basically saves the trouble of writing logging / error-check code for one-off experiments. (Or if you're writing in asm or something where there's a good chance you accidentally passed the wrong args or even call number.) strace is much faster than GDB because it looks up...
Fastest way to determine if record exists
...know when you'll have to go back. Aliasing helps preventing stupid runtime errors; for example, unique column name that didn't need an alias is not unique any more because somebody created a column of same name in another, joined table.
– Nikola Markovinović
A...
403 Forbidden vs 401 Unauthorized HTTP responses
...s a problem with 401 Unauthorized, the HTTP status code for authentication errors. And that’s just it: it’s for authentication, not authorization.
Receiving a 401 response is the server telling you, “you aren’t
authenticated–either not authenticated at all or authenticated
incorrectl...
Swift native base class or NSObject
...example, where we don't base on NSObject, the compiler correctly spots the error in testIncorrect_CompilerShouldSpot,
reporting "... 'MyClass' is not convertible to 'MirrorDisposition'"
class MyClass {
let mString = "Test"
func getAsString() -> String {
return mString
}
func testIn...
Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged
... at start are about to be replaced by new text with length after. It is an error to attempt to make changes to s from this callback.
public void onTextChanged(CharSequence s, int start, int before, int count)
This method is called to notify you that, within s, the count characters beginning at...
Why can I use auto on a private type?
...d f() {
A::BB x; // OK, typedef name A::BB is public
A::B y; // access error, A::B is private
}
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The 'packages' element is not declared
...ig stated, the schema is indeed not validated (VS will complain about such error in any XML file, not just only for nuget). But since the file is auto-generated is safe (and only used by nuget - which handles the XML just fine) it is perfectly fine to ignore the warnings.
– Joe...