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How to solve the error LNK2019: unresolved external symbol - function?
...l but have not declared that class itself as import/export.
#ifdef MYDLL_EXPORTS
#define DLLEXPORT __declspec(dllexport)
#else
#define DLLEXPORT __declspec(dllimport)
#endif
class DLLEXPORT Book // <--- this class must also be declared as export/import
{
public:
Book();
...
How would one write object-oriented code in C? [closed]
...
int (*close)(void *self);
int (*read)(void *self, void *buff, size_t max_sz, size_t *p_act_sz);
int (*write)(void *self, void *buff, size_t max_sz, size_t *p_act_sz);
// And data goes here.
} tCommClass;
tCommClass commRs232;
commRs232.open = &rs232Open;
: :
commRs232.write = &...
Prevent users from submitting a form by hitting Enter
...ys:
A form element's default button is the first submit button in tree order whose form owner is that form element.
If the user agent supports letting the user submit a form implicitly (for example, on some platforms hitting the "enter" key while a text field is focused implicitly submits t...
In C, do braces act as a stack frame?
... int big[100000000];
foo(big);
}
bar();
}
gives:
_foobar:
pushl %ebp
movl %esp, %ebp
movl $400000008, %eax
call __alloca
cmpl $0, 8(%ebp)
je L2
leal -400000000(%ebp), %eax
movl %eax, (%esp)
call _foo
L2:
ca...
How do I echo and send console output to a file in a bat script?
...ects stream2 to stream1 and 1>files.txt redirects all to files.txt.
The order is important here!
dir ... 1>nul 2>&1
dir ... 2>&1 1>nul
are different. The first one redirects all (STDOUT and STDERR) to NUL,
but the second line redirects the STDOUT to NUL and STDERR to the "e...
Java - Method name collision in interface implementation
...me class should also implement a Platform interface of a MVVM framework in order to get integrated.
Method collision occurred on a getString() method, which is announced by both interfaces and should have differenet implementation in different contexts.
The workaround (ugly..IMO) is using an inner c...
method overloading vs optional parameter in C# 4.0 [duplicate]
...nt of this call - notice you don't need to set the parameter values in the order as they appear in the method signature, the named parameter makes the value explicit.
DoFoo(c:"hello again", a:100)
Another benefit of using named parameter is that it greatly enhances readability and thus code mai...
What is the parameter “next” used for in Express?
..., in my opinion, since it doesn't rely on a particular URI scheme or route ordering. I'd be inclined to model the example shown like this, assuming a Users model with an async findOne():
function loadUser(req, res, next) {
if (req.params.userId) {
Users.findOne({ id: req.params.userId }, fun...
How can I change the color of AlertDialog title and the color of the line under it
...ddress example you give in your original question.
With QustomDialog, in order to create a basic dialog (title, message) with a desired different color for the title or divider, you use the following code:
private String HALLOWEEN_ORANGE = "#FF7F27";
QustomDialogBuilder qustomDialogBuilder = new...
Pretty-print an entire Pandas Series / DataFrame
I work with Series and DataFrames on the terminal a lot. The default __repr__ for a Series returns a reduced sample, with some head and tail values, but the rest missing.
...