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How to check if object (variable) is defined in R?
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You win by 52 seconds :)
– Dirk Eddelbuettel
Feb 20 '12 at 21:51
10
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How can I get a file's size in C? [duplicate]
....g.:
fseek(fp, 0L, SEEK_SET);
or (if seeking to go to the beginning)
rewind(fp);
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Is there a way of setting culture for a whole application? All current threads and new threads?
...ut only with Framework 4.5+
I put in this static constructor
static MainWindow()
{
CultureInfo culture = CultureInfo
.CreateSpecificCulture(CultureInfo.CurrentCulture.Name);
var dtf = culture.DateTimeFormat;
dtf.ShortTimePattern = (string)Microsoft.Win32.Registry.GetValue(
"HKEY_CUR...
Stop and Start a service via batch or cmd file?
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EnumDepend------Enumerates Service Dependencies.
The following commands don't require a service name:
sc <server> <command> <option>
boot------------(ok | bad) Indicates whether the last boot should
be saved as the last-known-g...
Large Object Heap Fragmentation
...se allocated size is a multiple of 8 bytes would probably be a performance win. Otherwise, while performance of a heavily-used double[] that's cache-aligned would be better than that of one that isn't, I don't know why size would correlate with usage.
– supercat
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Why does Java's hashCode() in String use 31 as a multiplier?
... subtract instruction. However, if your multiplier is slow this is still a win. Modern processors tend to have fast multipliers so it doesn't make much difference, so long as 32 goes on the correct side.
It's not a great hash algorithm, but it's good enough and better than the 1.0 code (and very mu...
Programmer Puzzle: Encoding a chess board state throughout a game
...s “all subsequent legal moves”. The problem also says nothing about knowing the moves up to this point. That’s actually a problem as I’ll explain.
Castling
The game has proceeded as follows:
e4 e5
Nf3 Nc6
Bb5 a6
Ba4 Bc5
The board looks as follows:
White has the option of castling...
Xml configuration versus Annotation based configuration [closed]
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I think that visibility is a big win with an XML based approach. I find that the XML isn't really that bad, given the various tools out there for navigating XML documents (i.e. Visual Studio + ReSharper's File Structure window).
You can certainly take a mi...
What is a segmentation fault?
... mapped files it is possible for someone else to mess with your memory. In WIN32 there are nasty API's like 'WriteProcessMemory' too!
– paulm
Feb 17 '14 at 23:46
1
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Solutions for INSERT OR UPDATE on SQL Server
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@CashCow, the last wins, this is what INSERT or UPDATE is supposed to do: the first one inserts, the second updates the record. Adding a lock allow this to happen in a very short time-frame, preventing an error.
– Jean Vin...