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What are the main purposes of using std::forward and which problems it solves?
... modify these
The third attempt accepts const-references, but then const_cast's the const away:
template <typename A, typename B, typename C>
void f(const A& a, const B& b, const C& c)
{
E(const_cast<A&>(a), const_cast<B&>(b), const_cast<C&>(c))...
How to loop through all enum values in C#? [duplicate]
...Foos));
Or the typed version:
var values = Enum.GetValues(typeof(Foos)).Cast<Foos>();
I long ago added a helper function to my private library for just such an occasion:
public static class EnumUtil {
public static IEnumerable<T> GetValues<T>() {
return Enum.GetVa...
How to add a TextView to LinearLayout in Android
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Why would that change anything? All it does is cast sooner rather than later, which should have the same effect.
– yesennes
May 19 '16 at 13:06
add...
Correct format specifier to print pointer or address?
... debate whether you should explicitly convert the pointers with a (void *) cast. It is being explicit, which is usually good (so it is what I do), and the standard says 'the argument shall be a pointer to void'. On most machines, you would get away with omitting an explicit cast. However, it woul...
How can I cast int to enum?
How can an int be cast to an enum in C#?
31 Answers
31
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MySQL integer field is returned as string in PHP
...rray had appropriate data types. Now I'm having to write code to manually cast every element to the data type I'm expecting.
– GordonM
Mar 25 '11 at 10:14
25
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What happens if you static_cast invalid value to enum class?
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Answering with a quote from the C++11 and C++14 Standards:
[expr.static.cast]/10
A value of integral or enumeration type can be explicitly converted to an enumeration type. The value is unchanged if the original value is within the range of the enumeration values (7.2). Otherwise, the resulti...
Cast an instance of a class to a @protocol in Objective-C
... [vc protocolMethod];
}
The UIViewController <MyProtocol> * type-cast translates to "vc is a UIViewController object that conforms to MyProtocol", whereas using id <MyProtocol> translates to "vc is an object of an unknown class that conforms to MyProtocol".
This way the compiler wil...
Get spinner selected items text?
...ter. Your adapter must be of cursor base so it will return cursor. try typecasting it to cursor and then retrieve your value from cursor.
– Farhan
Nov 28 '14 at 18:12
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What does = +_ mean in JavaScript
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r = +_;
+ tries to cast whatever _ is to a number.
_ is only a variable name (not an operator), it could be a, foo etc.
Example:
+"1"
cast "1" to pure number 1.
var _ = "1";
var r = +_;
r is now 1, not "1".
Moreover, according to the M...