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T-SQL datetime rounded to nearest minute and nearest hours with using functions
...en the datetime in question and a fixed point in time (0, which implicitly casts to 1900-01-01 00:00:00.000):
declare @days int
set @days = datediff(day, 0, @dt)
and then add that number of days to the fixed point in time, which gives you the original date with the time set to 00:00:00.000:
sele...
Safe (bounds-checked) array lookup in Swift, through optional bindings?
..., to clarify the situation: b contains a value and the value is nil. If we casted automatically to Int?, we would loose the information, if we got a hit or a miss in the array, which might be necessary in some circumstances. I would rather debate, if Swift could get rid of automatically casting valu...
JavaScript plus sign in front of function expression
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Subsidiary to @TJCrowder's answer, + is usually used to force numerical casting of a value as this SO answer explains. In this instance it is called the 'unary plus operator' (for ease of googling).
var num = +variant;
So in front of a function it can be a way to force the function's result to...
MIN and MAX in C
... macro from doing such potentially dangerous type promotions, a final type cast to the intended type was used.
Rationale
We want both parameters to the macro to be of the same type. If one of them is of a different type, the macro is no longer type safe, because an operator like ?: will yield impl...
Pan & Zoom Image
...he ScaleTransform in a similar manner you get TranslateTransform. That is, Cast it to a TransformGroup then select and cast the appropriate Child. 2) If your movement is Jittery remember that you can't use the image to get your mouse position (since its dynamic), you have to use something static. In...
How to handle click event in Button Column in Datagridview?
...ll have to check for that below.
Dos:
So here's what you should do:
First, cast the sender to type DataGridView to expose it's internal properties at design time. You can modify the type on the parameter, but that can sometimes make adding or removing handlers tricky.
Next, to see if a button was c...
Convert a float64 to an int in Go
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Such casts have a problem in Go that can be unexpected (at least if you come from Java): "In all non-constant conversions involving floating-point or complex values, if the result type cannot represent the value the conversion suc...
How to unit test abstract classes: extend with stubs?
... Oh no.. another tenet I'm gong to have to rethink! Thanks (both sarcastically for now, and non-sarcastically for once I have assimilated it and feel like a better programmer)
– Martin Lyne
Mar 18 '13 at 10:12
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How to update PATH variable permanently from Windows command line?
...rentControlSet\Control\Session Manager\Environment registry key, then broadcast a WM_SETTINGCHANGE message with lParam set to the string "Environment". This allows applications, such as the shell, to pick up your updates.
Note that your application will need elevated admin rights in order to be ab...
Purpose of Unions in C and C++
...sn't force the standard to declare it as undefined behaviour - reinterpret_cast has exactly the same endian issues, but has implementation defined behaviour.
– JoeG
Feb 22 '10 at 11:42
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