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How do I provide custom cast support for my class?
...s that users of your class will need to do an explicit conversion:
byte[] foo = new byte[] { 1, 2, 3, 4, 5 };
// explicitly convert foo into an instance of MyClass...
MyClass bar = (MyClass)foo;
// explicitly convert bar into a new byte[] array...
byte[] baz = (byte[])bar;
Using implicit means th...
How can I plot with 2 different y-axes?
I would like superimpose two scatter plots in R so that each set of points has its own (different) y-axis (i.e., in positions 2 and 4 on the figure) but the points appear superimposed on the same figure.
...
Scala equivalent of Java java.lang.Class Object
...Nov. 2011, two years later, fixed.
In 2.9.1, getClass now does:
scala> "foo".getClass
res0: java.lang.Class[_ <: java.lang.String] = class java.lang.String
)
Back in 2009:
It would be useful if Scala were to treat the return from getClass() as a java.lang.Class[T] forSome { val T : C...
Using Ajax.BeginForm with ASP.NET MVC 3 Razor
...mple:
Model:
public class MyViewModel
{
[Required]
public string Foo { get; set; }
}
Controller:
public class HomeController : Controller
{
public ActionResult Index()
{
return View(new MyViewModel());
}
[HttpPost]
public ActionResult Index(MyViewModel model...
Modulo operator with negative values [duplicate]
...imizing divide-by-power-of-two operations as shifts. Under the old rules, foo /= 16 could be written as asr [dword foo],4. Under the new rules, the optimal representation requires many more instructions [perhaps mov eax,[foo] / mov ebx,eax, asr eax,31 / lsr eax,28 / add eax,ebx / asr eax,4 / mov [...
sqlalchemy IS NOT NULL select
...
In case anyone else is wondering, you can use is_ to generate foo IS NULL:
>>> from sqlalchemy.sql import column
>>> print column('foo').is_(None)
foo IS NULL
>>> print column('foo').isnot(None)
foo IS NOT NULL
...
How to run Visual Studio post-build events for debug build only
How can I limit my post-build events to running only for one type of build?
10 Answers
...
After array_filter(), how can I reset the keys to go in numerical order starting at 0
...s an array with mixed values in it that will expose the trouble:
$array=['foo',NULL,'bar',0,false,null,'0',''];
Null values will be removed regardless of uppercase/lowercase.
But look at what remains in the array when we use array_values() & array_filter():
array_values(array_filter($array)...
Retrieve specific commit from a remote Git repository
...ds/master is specified in transfer.hideRefs and
the current namespace is foo, then refs/namespaces/foo/refs/heads/master
is omitted from the advertisements but refs/heads/master and
refs/namespaces/bar/refs/heads/master are still advertised as so-called
"have" lines.
In order to match refs...
What does %w(array) mean?
...
%w(foo bar) is a shortcut for ["foo", "bar"]. Meaning it's a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspide...