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Inheriting constructors
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If your compiler supports C++11 standard, there is a constructor inheritance using using (pun intended). For more see Wikipedia C++11 article. You write:
class A
{
public:
explicit A(int x) {}
};
class B: public A
{
using A::A;
};
This i...
Spark java.lang.OutOfMemoryError: Java heap space
... suggestions:
If your nodes are configured to have 6g maximum for Spark (and are leaving a little for other processes), then use 6g rather than 4g, spark.executor.memory=6g. Make sure you're using as much memory as possible by checking the UI (it will say how much mem you're using)
Try using more ...
How do I convert struct System.Byte byte[] to a System.IO.Stream object in C#?
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This is the best answer. It's concise and covers all the practical applications. There's a gotcha with just using the byte array based constructor as indicated here--the resulting stream is not re-sizable.
– Jduv
Jul 19 '12 ...
String concatenation in MySQL
I am using MySQL and MySQL Workbench 5.2 CE. When I try to concatenate 2 columns, last_name and first_name , it doesn't work :
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How do I get the filepath for a class in Python?
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This is the wrong approach for Django and really forcing things.
The typical Django app pattern is:
/project
/appname
models.py
views.py
/templates
index.html
etc.
share
...
How can I catch a ctrl-c event?
...;stdlib.h>
#include <stdio.h>
#include <unistd.h>
void my_handler(int s){
printf("Caught signal %d\n",s);
exit(1);
}
int main(int argc,char** argv)
{
struct sigaction sigIntHandler;
sigIntHandler.sa_handler = my_handler;
sigemptyset(&sigIntHand...
How to limit setAccessible to only “legitimate” uses?
...UT THIS???
That depends entirely on what types of programs you're writing and for what kind of an architecture.
If you're distributing a software component called foo.jar to the people of the world, you're completely at their mercy anyway. They could modify the class definitions inside your .jar (...
Where does Visual Studio look for C++ header files?
...a copy of a C++ application from SourceForge (HoboCopy, if you're curious) and tried to compile it.
6 Answers
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Get the closest number out of an array
I have a number from minus 1000 to plus 1000 and I have an array with numbers in it. Like this:
20 Answers
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Create a dictionary on a list with grouping
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Just to make mquander's suggestion concrete:
var groupedDemoClasses = mySpecialVariableWhichIsAListOfDemoClass
.GroupBy(x => x.GroupKey)
.ToDictionary(gdc => gdc.Key, gdc =>...