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How to validate phone numbers using regex
... Also a role of validation is simply to remind people to add area codes etc that they might not otherwise remember to add, but which cannot possibly be guessed after the fact.
– Ben McIntyre
Feb 23 '11 at 0:09
...
How to remove an element from an array in Swift
... them. Instead, you create a new object. This is what delete, map, reduce, etc. does. list will be a newly created object. In the above code snippet I'm assigning back to list a newly created object. That works for me, because I design my code in a way that follows functional programming.
...
How to reload or re-render the entire page using AngularJS
...h contexts and re-render everything again (resending all $http requests, etc). If I just redirect the user somewhere else, things work properly:
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How are virtual functions and vtable implemented?
...bl contents are simply an array of member pointers there (generally in the order they were declared, with the base class's first). There are of course other possible layouts, but that's what I've generally observed.
class A {
public:
virtual int f1() = 0;
};
class B : public A {
public:
vir...
Why aren't python nested functions called closures?
...ariables to the inner function, modifying an object on the inner function, etc.
In Python 3, support is more explicit - and succinct:
def closure():
count = 0
def inner():
nonlocal count
count += 1
print(count)
return inner
Usage:
start = closure()
start() # ...
What is the difference between sigaction and signal?
... }
// DO PROGRAM CLEANUP HERE, such as freeing memory, closing files, etc.
exit(signal);
}
/// @brief Set a new signal handler action for a given signal
/// @details Only update the signals with our custom handler if they are NOT set to "signal ignore" (`SIG_IGN`),
/// ...
What is the right way to check for a null string in Objective-C?
...
I have found that in order to really do it right you end up having to do something similar to
if ( ( ![myString isEqual:[NSNull null]] ) && ( [myString length] != 0 ) ) {
}
Otherwise you get weird situations where control...
How much is the overhead of smart pointers compared to normal pointers in C++?
...plementation details and CPU architecture for write barriers, atomic locks etc. once listening you will never talk about this feature being cheap. If you just want a proof of the magnitude slower, skip the first 48 minutes and watch him running example code which runs upto 180 times slower (compiled...
configure Git to accept a particular self-signed server certificate for a particular https remote
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CSS Cell Margin
...ing as above, avoid any styling of the cells (background colours, borders, etc.) and instead use container DIVs inside the cells to implement such styling.
I am not a CSS expert, so I could well be wrong in the above (which would be great to know! I too would like a table cell margin CSS solution)....