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Is it better in C++ to pass by value or pass by constant reference?
...pass-by-reference the compiler cannot assume that always. Simple example:
foo * f;
void bar(foo g) {
g.i = 10;
f->i = 2;
g.i += 5;
}
the compiler can optimize it into
g.i = 15;
f->i = 2;
since it knows that f and g doesn't share the same location. if g was a reference (foo &...
Using custom std::set comparator
... typedef std::set< T, ftor > t;
};
// usage
bool my_comparison( foo const &l, foo const &r );
set_funcomp< foo, my_comparison >::t boo; // just the way you want it!
Wow, I think that was worth the trouble!
...
Get current URL with jQuery?
...
http://www.refulz.com:8082/index.php#tab2?foo=789
Property Result
------------------------------------------
host www.refulz.com:8082
hostname www.refulz.com
port 8082
protocol http:
pathname index.php
href http://www.refulz.com:8082...
The Android emulator is not starting, showing “invalid command-line parameter”
...h:
"C:\Program Files (x86)\Android\android-sdk\tools\emulator-arm.exe" @foo
foo is the name of your virtual device.
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SQLAlchemy: Creating vs. Reusing a Session
... db_session.close()
connection.close()
Usage:
from mymodels import Foo
with db_session("sqlite://") as db:
foos = db.query(Foo).all()
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How to set custom location for local installation of npm package?
...o this by using the --prefix flag and the --global* flag.
pje@friendbear:~/foo $ npm install bower -g --prefix ./vendor/node_modules
bower@0.7.0 /Users/pje/foo/vendor/node_modules/bower
*Even though this is a "global" installation, installed bins won't be accessible through the command line unless ...
How to convert a Binary String to a base 10 integer in Java
...radix. There's an overload of Integer#parseInt() which allows you to.
int foo = Integer.parseInt("1001", 2);
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Calling a function from a string in C#
...ipped */
public delegate void functionPointer();
functionPointer foo = hello;
foo(); // Writes hello world to the console.
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Inline comments for Bash?
....) syntax doesn't actually seem to allow embedding comments: whereas echo "foo" `# comment` "bar" will terminate the comment at the second backtick, the supposed equivalent echo "foo" $(: # comment) "bar" doesn't parse anything behind the #.
– leftaroundabout
J...
How to convert a char array back to a string?
...very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a zero byte on...