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Read an Excel file directly from a R script
...tem -- usually already true on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). There are various caveats, and alternatives, listed on the R wiki page.
The only reason I see not to do this directly is that you may want to examine the spreadsheet to see if i...
If strings are immutable in .NET, then why does Substring take O(n) time?
...sistent strategy that encourages reuse of most of the memory is also not a win; all you've done is made your garbage collector get slower because now it has to worry about handling interior pointers.
If the substring operations people typically did on strings were completely different, then it wou...
To underscore or to not to underscore, that is the question
...use "this" to refer to any member
UPDATE: as was pointed out the following isn't an advantage point
Maintenance
underscore-notation requires you to keep an eye on _ while refactoring, say turning a field into property (remove _) or the opposite (add _)
this-notation doesn't have ...
How fast is D compared to C++?
...ations and disable all safety checks, compile your D program with the following DMD flags:
-O -inline -release -noboundscheck
EDIT: I've tried your programs with g++, dmd and gdc. dmd does lag behind, but gdc achieves performance very close to g++. The commandline I used was gdmd -O -release -inl...
When should I use RequestFactory vs GWT-RPC?
...-dicing of the data in the Person object. This works quite well until you wind up wanting to have server-specific, non-GWT-compatible, code inside your class. Because the RPC system is based on having the same concrete type on both the client and the server, you can hit a complexity wall based on ...
Is there any async equivalent of Process.Start?
...
@svick In window form, process.SynchronizingObject should be set to forms component to avoid methods that handle events (such as Exited, OutputDataReceived, ErrorDataReceived) are called on separated thread.
– Kev...
Performance of FOR vs FOREACH in PHP
...ify inline)...
As for the iterators, foreach is equivalent to:
$it->rewind();
while ($it->valid()) {
$key = $it->key(); // If using the $key => $value syntax
$value = $it->current();
// Contents of loop in here
$it->next();
}
As far as there being faster w...
How can I export tables to Excel from a webpage [closed]
...r-side language required, and most of all very EASY to understand. It's a win-win. The one thing it does have limits on, though, is strict formatting of columns.
If formatting and colors are absolute dealbreakers, the only 100% reliable, cross browser method I've found is to use a server-side lan...
What is the Haskell response to Node.js?
...ust the linear complexity caused by epoll. And just let us dont talk about windows performance... Node.js is much faster because it uses IOCP.
– Kr0e
Aug 2 '13 at 13:55
...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
...
Source: http://www.javamex.com/tutorials/threads/yield.shtml
Windows
In the Hotspot implementation, the way that Thread.yield() works has
changed between Java 5 and Java 6.
In Java 5, Thread.yield() calls the Windows API call Sleep(0). This
has the special effect of clear...