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Can I implement an autonomous `self` member type in C++?
...oo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you want (thanks to variadic templates and variadic macros):
class WITH_SELF(Foo2)
{
/* ... */
};
class WITH_SELF_DERIVED(Bar2,Foo,Foo2)
{
/* ... */
};
I have verified this to work on gcc 4.8 and c...
How to move a model between two Django apps (Django 1.7)
...include these operations.
class Migration(migrations.Migration):
database_operations = [migrations.AlterModelTable('TheModel', 'newapp_themodel')]
state_operations = [migrations.DeleteModel('TheModel')]
operations = [
migrations.SeparateDatabaseAndState(
database_operat...
Converting an int to std::string
...
Overkill? Based on what? boost.org/doc/libs/1_53_0/doc/html/boost_lexical_cast/…
– Catskul
Jun 3 '13 at 22:34
...
How many threads is too many?
...he request is received. I do this because almost every request makes a database query. I am using a threadpool library to cut down on construction/destruction of threads.
...
Iterate over the lines of a string
...
1000 loops, best of 3: 406 usec per loop
not quite as good as the .find based approach -- still, worth keeping in mind because it might be less prone to small off-by-one bugs (any loop where you see occurrences of +1 and -1, like my f3 above, should automatically trigger off-by-one suspicions -- ...
What is “2's Complement”?
... 22 + 1 × 21 + 1 × 20and if you work it out, that turns out to equal 15 (base 10). That's because it is 8+4+2+1 = 15.
This is all well and good for positive numbers. It even works for negative numbers if you're willing to just stick a minus sign in front of them, as humans do with decimal nu...
How do exceptions work (behind the scenes) in c++
...ecutable). All the work is done behind the scenes by the standard library, based on these tables (_ZTI11MyException is typeinfo for MyException).
OK, that was not actually a surprise for me, I already knew how this compiler did it. Continuing with the assembly output:
.text
.align 2
.p...
Min/Max of dates in an array?
...ngth; ++i) { func(array[i]); } } function reduce(combine, base, array) { foreach(function(element) { base = combine(base, element); }, array); return base; }
– blaze
Jan 29 '13 at 0:36
...
Comparing object properties in c# [closed]
...oblems with overriding .Equals() because i'm trying to implement this on a base class that gets inherited... because I don't know the keys for the class this'll be run against, i can't implement a decent override for GetHasCode() (req'd when you override Equals()).
– nailitdown...
What is the most ridiculous pessimization you've seen? [closed]
...bing 16 bits from RAM was quicker than grabbing 32 bits.
I had to write a demo program to show that grabbing 32-bit values on a 32-bit system was faster than grabbing 16-bit values, and explain that to grab a 16-bit value the CPU had to make a 32-bit wide memory access and then mask out or shift th...