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Pimpl idiom vs Pure virtual class interface
...ect it knows to be this.
On the user side of the code, a new A will first allocate sizeof(A) bytes of memory, then hand a pointer to that memory to the A::A() constructor as this.
If in a later revision of your library you decide to drop the integer, make it larger, smaller, or add members, there'...
What’s the best RESTful method to return total number of items in an object?
...we should use headers to transmit other informations like total, next page token and previous page token. I never tried it and I need advice from other developers.
– Loenix
Oct 24 '16 at 6:55
...
How to forward declare a template class in namespace std?
...rs. Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
...
Type erasure techniques
...plementations, or you could store the data elsewhere (e.g. in a separately allocated buffer), and just have the derived class provide the virtual function implementations, which take a void* that points to the data. If you store the data in a separate buffer, then you could use function pointers rat...
“User interaction is not allowed” trying to sign an OSX app using codesign
...GNABLE"
Final notes - if you look at how Xcode does it they set CODESIGN_ALLOCATE to use the one contained in Xcode, not in /usr/bin.
export CODESIGN_ALLOCATE="$( xcrun --find codesign_allocate )"
The search path is set to ${PLATFORM_PATH}:${TOOLCHAIN_PATH}:${PATH}, where PLATFORM path is the /...
Software Design vs. Software Architecture [closed]
...
I'd say you are right, in my own words;
Architecture is the allocation of system requirements to system elements. Four statements about an architecture:
It can introduce non-functional requirements like language or patterns.
It defines the interaction between components, interfaces,...
Convert NSDate to NSString
...
How about...
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy"];
//Optionally for time zone conversions
[formatter setTimeZone:[NSTimeZone timeZoneWithName:@"..."]];
NSString *stringFromDate = [formatter stringFromDate:myNSDateInstance];
...
Is the practice of returning a C++ reference variable evil?
...
return i; // DON'T DO THIS.
}
That is all sorts of evil. The stack-allocated i will go away and you are referring to nothing. This is also evil:
int& getInt() {
int* i = new int;
return *i; // DON'T DO THIS.
}
Because now the client has to eventually do the strange:
int&...
When to use a linked list over an array/array list?
...you know the number of elements in the array ahead of time so that you can allocate the correct amount of memory for the array
you need speed when iterating through all the elements in sequence. You can use pointer math on the array to access each element, whereas you need to lookup the node based...
What are the differences between “=” and “
...d about so far.
The second meaning isn’t an operator but rather a syntax token that signals named argument passing in a function call. Unlike the = operator it performs no action at runtime, it merely changes the way an expression is parsed.
Let’s see.
In any piece of code of the general form...