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How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
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365
DateTime.strptime can handle seconds since epoch. The number must be converted to a string:
r...
Unicode Processing in C++
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answered Sep 11 '08 at 1:37
hazzenhazzen
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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'...
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...
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...
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, ...
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:
...
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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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...
Is it better to use std::memcpy() or std::copy() in terms to performance?
...ion. In my test, I hash 5 strings using all four SHA-2 versions (224, 256, 384, 512), and I loop 300 times. I measure times using Boost.timer. That 300 loop counter is enough to completely stabilize my results. I ran the test 5 times each, alternating between the memcpy version and the std::copy ver...