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Select distinct values from a table field
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3 Answers
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Active
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ASP.NET Identity's default Password Hasher - How does it work and is it secure?
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234
Here is how the default implementation (ASP.NET Framework or ASP.NET Core) works. It uses a Key...
Are Swift variables atomic?
... proposal https://github.com/apple/swift-evolution/blob/master/proposals/0030-property-behavior-decls.md - it looks like it is going to be possible to have @atomic behavior implemented by yourself.
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How to check Oracle database for long running queries
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135
This one shows SQL that is currently "ACTIVE":-
select S.USERNAME, s.sid, s.osuser, t.sql_id, ...
Detecting endianness programmatically in a C++ program
... what unions are for !
bool is_big_endian(void)
{
union {
uint32_t i;
char c[4];
} bint = {0x01020304};
return bint.c[0] == 1;
}
The principle is equivalent to the type case as suggested by others, but this is clearer - and according to C99, is guaranteed to be corre...
Checking if a string can be converted to float in Python
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316
I would just use..
try:
float(element)
except ValueError:
print "Not a float"
..it'...
When is a C++ destructor called?
...ferences. It's all up to you to pick the pieces that do what you want.
3) Would you ever want to call a destructor manually?
Sure. One example would be if you want to replace an object with another object of the same type but don't want to free memory just to allocate it again. You can destroy...
How do I best silence a warning about unused variables?
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331
You can put it in "(void)var;" expression (does nothing) so that a compiler sees it is used. T...
Why would one use nested classes in C++?
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230
Nested classes are cool for hiding implementation details.
List:
class List
{
public:
...