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g++ undefined reference to typeinfo
...no-rtti and -frtti code. Then you need to ensure that any class, which type_info is accessed in the -frtti code, have their key method compiled with -frtti. Such access can happen when you create an object of the class, use dynamic_cast etc.
[source]
...
jQuery UI: Datepicker set year range dropdown to 100 years
...ed):
for (a.yearshtml+='<select class="ui-datepicker-year" onchange="DP_jQuery_'+y+".datepicker._selectMonthYear('#"+
a.id+"', this, 'Y');\" onclick=\"DP_jQuery_"+y+".datepicker._clickMonthYear('#"+a.id+"');\">";b<=g;b++)
a.yearshtml+='<option value="'+b+'"'+(b==c?' selected="selected"...
Scala equivalent of Java java.lang.Class Object
...: java.lang.Class[C] = class C
scala> c.getClass
res1: java.lang.Class[_] = class C
That is why the following will not work:
val xClass: Class[X] = new X().getClass //it returns Class[_], nor Class[X]
val integerClass: Class[Integer] = new Integer(5).getClass //similar error
There is a ticket...
C++ display stack trace on exception
...
On the home page of StackTrace, I see throw stack_runtime_error. Am I correct in deducing that this lib only works for exceptions derived from that class, and not for std::exception or exceptions from third-party libraries?
– Thomas
No...
What version of Visual Studio is Python on my computer compiled with?
...
Visual C++ version _MSC_VER
Visual C++ 4.x 1000
Visual C++ 5 1100
Visual C++ 6 1200
Visual C++ .NET 1300
Visual C++ .NET 2003 1310
Visual C++ 2005 (8.0) ...
Hidden features of C
...ints to the compiler (common in the Linux kernel)
#define likely(x) __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
see: http://kerneltrap.org/node/4705
What I like about this is that it also adds some expressiveness to some functions.
void foo(int arg)
{
if (...
What are Flask Blueprints, exactly?
...laster of your application.
# An example
from flask import Blueprint
tree_mold = Blueprint("mold", __name__)
@tree_mold.route("/leaves")
def leaves():
return "This tree has leaves"
@tree_mold.route("/roots")
def roots():
return "And roots as well"
@tree_mold.route("/rings")
@tree_mold.r...
What is copy-on-write?
... data):
raise NotImplementedError
class Value(BaseValue):
def __init__(self, data):
self.data = data
def read(self):
return self.data
def write(self, data):
pass
class ValueProxy(BaseValue):
def __init__(self, subject):
self.subject = subject...
Do I have to Close() a SQLConnection before it gets disposed?
...rride void Dispose(bool disposing)
{
if (disposing)
{
this._userConnectionOptions = null;
this._poolGroup = null;
this.Close();
}
this.DisposeMe(disposing);
base.Dispose(disposing);
}
...
Why does changing 0.1f to 0 slow down performance by 10x?
...Here's the test code compiled on x64:
int main() {
double start = omp_get_wtime();
const float x[16]={1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.6};
const float z[16]={1.123,1.234,1.345,156.467,1.578,1.689,1.790,1.812,1.923,2.034,2.145,2.256,2.367,2.478,2.589,2.690}...