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Is returning by rvalue reference more efficient?
...g by rvalue can be more efficient. std::move() is just used as an explicit cast to illustrate the point more clearly. It's not a code you would copy-paste into your project. It doesn't contradict top-voted answer, because there temporary object is created inside the function. Here returned object is...
How to convert a String to its equivalent LINQ Expression Tree?
...
{
var invokedExpr = Expression.Invoke(expr2, expr1.Parameters.Cast<Expression>());
return Expression.Lambda<Func<T, TResult>>(Expression.AndAlso(expr1.Body, invokedExpr), expr1.Parameters);
}
public static Func<T, TResult> ExpressionToFunc<T, ...
Any way to declare an array in-line?
...
It resembles casting. I think that's how I'll think of it so I don't have to google it the once in a bluemoon I need to do this.
– ArtOfWarfare
Aug 21 '12 at 16:10
...
Preview layout with merge root tag in Intellij IDEA/Android Studio
...lt;/com.mycompany.SomeView>
And then directly inflate this layout and cast result view to SomeView.
Android studio will directly check parent class of SomeView and handle preview like LinerLayout.
You can use onFinishInflate() method in the SomeView to bind views by findViewById().
Benefit of t...
Building big, immutable objects without using constructors having long parameter lists
...ver you give them a mutable object named Immutable that simply needs to be cast to it's mutable interface. The separate class approach requires methods to convert back and forth. The JodaTime API uses this pattern. See DateTime and MutableDateTime.
– toolbear
A...
range over interface{} which stores a slice
...ray[:]), you'll have to use reflection to decide that it is an array, then cast to array - then generate a slice of it. That's why I said it works on a slice, not on an array. Clearly with enough effort you can produce a slice out of the array...
– user1028741
...
What is the difference between IQueryable and IEnumerable?
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The only benefit is convenience. AsQueryable() will just cast an enumerable to a queryable and return it if it implements the IQueryable interface, otherwise it wraps it in a ConstantExpression, which is referred to in a returned EnumerableQuery object.
– Mar...
C++ template constructor
...ame T> C(T*);
};
template <typename T> T* UseType()
{
static_cast<T*>(nullptr);
}
Then to create an object of type C using int as the template parameter to the constructor:
C obj(UseType<int>());
Since you can't pass template parameters to a constructor, this solution ...
How to define a custom ORDER BY order in mySQL
...ally it will use that internal index instead of the string values ( unless CAST() is used to make it back to a VARCHAR)
– Simon at My School Portal
Mar 26 '15 at 9:36
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What is the difference between char array and char pointer in C?
...
static char __unnamed[] = "abc";
char *c = __unnamed;
Note the implicit cast from char[] to char *, which is always legal.
Then if you modify c[0], you also modify __unnamed, which is UB.
This is documented at 6.4.5 "String literals":
5 In translation phase 7, a byte or code of value zero i...