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What happens if I define a 0-size array in C/C++?
...
An array cannot have zero size.
ISO 9899:2011 6.7.6.2:
If the em>x m>pression is a constant em>x m>pression, it shall have a value greater than zero.
The above tem>x m>t is true both for a plain array (paragraph 1). For a VLA (variable length array), the behavior is undefined if the em>x m>pression's valu...
Why are side-effects modeled as monads in Haskell?
...asically impossible. (Think of trying to copy the entire filesystem, for em>x m>ample. Where would you put it?) Therefore, our definition of IO encapsulates the states of the whole world as well.
Composition of "impure" functions
These impure functions are useless if we can't chain them together. Cons...
Programmatically create a UIView with color gradient
...)[UIColor blackColor].CGColor];
[view.layer insertSublayer:gradient atIndem>x m>:0];
Swift:
let view = UIView(frame: CGRect(m>x m>: 0, y: 0, width: 320, height: 50))
let gradient = CAGradientLayer()
gradient.frame = view.bounds
gradient.colors = [UIColor.white.cgColor, UIColor.black.cgColor]
view.layer....
Does List guarantee insertion order?
...d in the list in the order you add them, including duplicates, unless you em>x m>plicitly sort the list.
According to MSDN:
...List "Represents a strongly typed list of objects that can be
accessed by indem>x m>."
The indem>x m> values must remain reliable for this to be accurate. Therefore the order is g...
How do you create a random string that's suitable for a session ID in PostgreSQL?
...ength:
Create or replace function random_string(length integer) returns tem>x m>t as
$$
declare
chars tem>x m>t[] := '{0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,m>X m>,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,m>x m>,y,z}';
result tem>x m>t := '';
i integer := 0;
begin
if length <...
Java 8 Streams: multiple filters vs. complem>x m> condition
...
The code that has to be em>x m>ecuted for both alternatives is so similar that you can’t predict a result reliably. The underlying object structure might differ but that’s no challenge to the hotspot optimizer. So it depends on other surrounding condi...
ASP.NET Web API Authentication
... authentication cookie it retrieved in the first request.
Let's take an em>x m>ample. Suppose that you have 2 API controllers defined in your web application:
The first one responsible for handling authentication:
public class AccountController : ApiController
{
public bool Post(LogOnModel model...
What is the correct way to document a **kwargs parameter?
I'm using sphinm>x m> and the autodoc plugin to generate API documentation for my Python modules. Whilst I can see how to nicely document specific parameters, I cannot find an em>x m>ample of how to document a **kwargs parameter.
...
Can inner classes access private variables?
...Outer
{
class Inner
{
public:
Inner(Outer& m>x m>): parent(m>x m>) {}
void func()
{
std::string a = "myconst1";
std::cout << parent.var << std::endl;
if (a == MYCONST)
{ std::...
Python list directory, subdirectory, and files
...files in the directory and subdirectories matching some pattern (*.py for em>x m>ample):
import os
from fnmatch import fnmatch
root = '/some/directory'
pattern = "*.py"
for path, subdirs, files in os.walk(root):
for name in files:
if fnmatch(name, pattern):
print os.path.join(p...