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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ot show this weird behavior.
Of course, if an inappropriate alignment is done, it makes things worse. An unnecessary / bad alignment just eats up bytes for no reason and potentially increases cache misses, etc.
The noise it makes pretty much makes timing micro-optimizations
impossible.
H...
How to create a printable Twitter-Bootstrap page
...k rel="stylesheet" type="text/css" media="print" href="print.css">
or one you share for all devices:
<link rel="stylesheet" type="text/css" href="bootstrap.min.css"> # Note there's no media attribute
Then, you can write your styles for printers in the separate stylesheets or in the sha...
How to place two divs next to each other?
...
Float one or both inner divs.
Floating one div:
#wrapper {
width: 500px;
border: 1px solid black;
overflow: hidden; /* will contain if #first is longer than #second */
}
#first {
width: 300px;
float:left; /* a...
Following git-flow how should you handle a hotfix of an earlier release?
...
One should do a release on the hot fix, right? How can we do that?
– Ravindranath Akila
Jun 14 '17 at 7:30
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How to generate sample XML documents from their DTD or XSD?
....com/) does it as well, but that's another commerical product. It's a nice one, though... I'd strongly recommend it for anyone doing a lot of XML work. It comes in a nice Eclipse plugin, too.
I do believe there is a free, fully-featured 30 day trial.
...
How to concatenate stdin and a string?
...y think the best is:
echo input | while read line; do echo $line string; done
Another can be by substituting "$" (end of line character) with "string" in a sed command:
echo input | sed "s/$/ string/g"
Why i prefer the former? Because it concatenates a string to stdin instantly, for example wi...
Parse a .py file, read the AST, modify it, then write back the modified source code
...
Just for anyone using this in the future, codegen is largely out-of-date and has a few bugs. I've fixed a couple of them; I have this as a gist on github: gist.github.com/791312
– mattbasta
Jan 22 '...
Where can I learn how to write C code to speed up slow R functions? [closed]
...d Use the source, Luke! --- R itself has plenty of (very efficient) C code one can study, and CRAN has hundreds of packages, some from authors you trust. That provides real, tested examples to study and adapt.
But as Josh suspected, I lean more towards C++ and hence Rcpp. It also has plenty of exa...
“Treat all warnings as errors except…” in Visual Studio
...tribute. An ObsoleteAttribute without comment generates the error 612, and one with a comment generates 618.
– Marco Spatz
Mar 30 '11 at 11:00
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Debugging sqlite database on the device
...for your app to have WRITE_EXTERNAL_STORAGE permission, as the copying is done by the shell user who can always write to the external storage.
On Linux/Mac systems there is a possibility to copy a database directly to your computer with the following command one can use without entering the adb she...