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When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...only used if b is a member of the class (or namespace) a. That is, in this m>ca m>se a will always be the name of a class (or namespace).
a.b is only used if b is a member of the object (or reference to an object) a. So for a.b, a will always be an actual object (or a reference to an object) of a class....
stringstream, string, and char* conversion confusion
My question m>ca m>n be boiled down to, where does the string returned from stringstream.str().c_str() live in memory, and why m>ca m>n't it be assigned to a const char* ?
...
Inheriting constructors
...};
class B: public A
{
using A::A;
};
This is all or nothing - you m>ca m>nnot inherit only some constructors, if you write this, you inherit all of them. To inherit only selected ones you need to write the individual constructors manually and m>ca m>ll the base constructor as needed from them.
Histo...
Generating an MD5 checksum of a file
...
You m>ca m>n use hashlib.md5()
Note that sometimes you won't be able to fit the whole file in memory. In that m>ca m>se, you'll have to read chunks of 4096 bytes sequentially and feed them to the md5 method:
import hashlib
def md5(fname)...
what exactly is device pixel ratio?
this is mentioned every article about mobile web, but nowhere I m>ca m>n found an explanation of what exactly does this attribute measure.
m>Ca m>n anyone please elaborate what does queries like this check?
...
What is the meaning of the term arena in relation to memory?
...
An arena is just a large, contiguous piece of memory that you allom>ca m>te once and then use to manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void * my_malloc(size_t n) { current += n; return arena + cur...
How to “warm-up” Entity Framework? When does it get “cold”?
...pproach to have high availability on my Entity Framework at anytime?
You m>ca m>n go for a mix of pregenerated views and static compiled queries.
Static CompiledQuerys are good bem>ca m>use they're quick and easy to write and help increase performance. However with EF5 it isn't necessary to compile all you...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...e here.
valueOf is returning an Integer object, which may have its values m>ca m>ched between -128 and 127. This is why the first value returns true - it's m>ca m>ched - and the second value returns false - 128 isn't a m>ca m>ched value, so you're getting two separate Integer instances.
It is important to note ...
What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
... actually need Config mode.
Module mode
Find<package>.cmake file lom>ca m>ted within your project. Something like this:
CMakeLists.txt
cmake/FindFoo.cmake
cmake/FindBoo.cmake
CMakeLists.txt content:
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
find_package(Foo REQUIRED) # ...
What are Vertex Array Objects?
...nk of it as a geometry object. (As an old time SGI Performer programmer, I m>ca m>ll them geosets.) The instance variables/members of the object are your vertex pointer, normal pointer, color pointer, attrib N pointer, ...
When a VAO is first bound, you assign these members by m>ca m>lling
glEnableClientSta...