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Mutex example / tutorial? [closed]
...td::mutex m;//you can use std::lock_guard if you want to be exception safe
int i = 0;
void makeACallFromPhoneBooth()
{
m.lock();//man gets a hold of the phone booth door and locks it. The other men wait outside
//man happily talks to his wife from now....
std::cout << i <&...
What does the exclamation mark mean in a Haskell declaration?
...ok at an example, so that we can see just what this means:
data Foo = Foo Int Int !Int !(Maybe Int)
f = Foo (2+2) (3+3) (4+4) (Just (5+5))
The function f above, when evaluated, will return a "thunk": that is, the code to execute to figure out its value. At that point, a Foo doesn't even exist ye...
ViewBag, ViewData and TempData
...Test1");
}
public ActionResult Test1()
{
string Str = Convert.ToString(TempData["T"]);
TempData.Keep(); // Keep TempData
return RedirectToAction("Test2");
}
public ActionResult Test2()
{
string Str = Convert.ToString(TempData["T"]); //OutPut ...
Debugging with command-line parameters in Visual Studio
...
The Mozilla.org FAQ on debugging Mozilla on Windows is of interest here.
In short, the Visual Studio debugger can be invoked on a program from the command line, allowing one to specify the command line arguments when invoking a command line program, directly on the command line.
T...
Controlling mouse with Python
...api.mouse_event(win32con.MOUSEEVENTF_MOVE | win32con.MOUSEEVENTF_ABSOLUTE, int(x/SCREEN_WIDTH*65535.0), int(y/SCREEN_HEIGHT*65535.0)) in my experience for better integration with other application such as games.
– Falcon
May 31 '12 at 18:59
...
How can one see the structure of a table in SQLite? [duplicate]
...todos_server_snapshot
sqlite> .schema alarms
CREATE TABLE alarms (ROWID INTEGER PRIMARY KEY AUTOINCREMENT, alarm_id,
todo INTEGER, flags INTEGER, offset_days INTEGER,
reminder_date INTEGER, time INTEGER, argument,
unrecognized_data BL...
Group by in LINQ
...:
var results = from p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { PersonId = key, Car...
A monad is just a monoid in the category of endofunctors, what's the problem?
... = μ ∘ ηT = 1 (the identity natural transformation)
With a bit of squinting you might be able to see that both of these definitions are instances of the same abstract concept.
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ASP.Net MVC Html.HiddenFor with wrong value
... modelState[fullName].Value = new ValueProviderResult(metadata.Model, Convert.ToString(metadata.Model), currentValue.Culture);
}
else
{
modelState[fullName] = new ModelState
{
Value = new ValueProviderResult(metadata.Model, Convert...
Pair/tuple data type in Go
...nal exercise of the Tour of Go , I decided I needed a queue of ( string , int ) pairs. That's easy enough:
3 Answers
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