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What is an undefined reference/unresolved external symbol error and how do I fix it?
...s exist for other compilers/ platforms.
Common error messages are error LNK2001, error LNK1120, error LNK2019 for Microsoft Visual Studio and undefined reference to symbolName for GCC.
The code:
struct X
{
virtual void foo();
};
struct Y : X
{
void foo() {}
};
struct A
{
virtual ~A() = 0;
}...
How to create an android app using HTML 5
... Daniel KurkaDaniel Kurka
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selecting unique values from a column
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answered Dec 20 '11 at 7:10
Léon RodenburgLéon Rodenburg
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rreplace - How to replace the last occurrence of an expression in a string?
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answered Mar 31 '10 at 20:29
mg.mg.
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UIImagePickerController breaks status bar appearance
...ation] setStatusBarHidden:YES];
}
Regarding this awesome solution. For 2014 / iOS8 I found in some cases you need to ALSO include prefersStatusBarHidden and, possibly, childViewControllerForStatusBarHidden So...
-(void)navigationController:(UINavigationController *)navigationController
...
NullPointerException in Java with no StackTrace
...bal variable OmitStackTraceInFastThrow. Last time I looked at the code (in 2019), it was in the file graphKit.cpp.
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How to overcome “datetime.datetime not JSON serializable”?
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Updated for 2018
The original answer accommodated the way MongoDB "date" fields were represented as:
{"$date": 1506816000000}
If you want a generic Python solution for serializing datetime to json, check out @jjmontes' answer for a qu...
Checking if a double (or float) is NaN in C++
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answered Feb 20 '09 at 18:17
jalfjalf
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Java HashMap performance optimization / alternative
...nted out the hashCode() method was to blame. It was only generating around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every ...
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...fold over that)
– Wes
Apr 28 '12 at 20:00
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