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Class does not implement its superclass's required members
... I updated to Xcode 6 beta 5 today and noticed I received errors in nearly all of my subclasses of Apple's classes.
4 Answe...
Best Practice: Access form elements by HTML id or name attribute?
...submits it via AJAX (and you don't care about doing a regular submit as a fallback in case AJAX fails somehow), ...then you've made a mistake.
– Doin
Aug 18 '16 at 18:32
1
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How to implement classic sorting algorithms in modern C++?
... transparent comparators of the form std::less<> that act polymorphically on their arguments. This avoids having to provide an iterator's type. This can be used in combination with C++11's default function template arguments to create a single overload for sorting algorithms that take < as ...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
... v.end(); ++it) //v is some [std] container
{
//..
}
Or, more generally,
//good : auto increases readability here
for(auto it = std::begin(v); it != std::end(v); ++it)//v could be array as well
{
//..
}
But when the type is not very well-known and infrequently used , then I think ...
What are the recommendations for html tag?
I've never seen <base> HTML tag actually used anywhere before. Are there pitfalls to its use that means I should avoid it?
...
When should we use mutex and when should we use semaphore
... to sleep till you release the mutex.
Spinlock:
Use a spinlock when you really want to use a mutex but your thread is not allowed to sleep.
e.g.: An interrupt handler within OS kernel must never sleep. If it does the system will freeze / crash. If you need to insert a node to globally shared linke...
Best way to define error codes/strings in Java?
...re's certainly a better implementation of the enum solution (which is generally quite nice):
public enum Error {
DATABASE(0, "A database error has occurred."),
DUPLICATE_USER(1, "This user already exists.");
private final int code;
private final String description;
private Error(int code...
Applications are expected to have a root view controller at the end of application launch
... make sure self.window is initialized like self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
– Raptor
Feb 13 '12 at 12:07
1
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Creating and Update Laravel Eloquent
...
There is and it's called firstOrNew / firstsOrCreate
– malhal
Aug 24 '14 at 11:59
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How expensive is RTTI?
...where I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed.
...