Instead of relying on Delphi’s internal object layout you could also have your objects implement another interface which would simply return the object. This, of course, only works if you have access to the source code of the objects to begin with, but you probably shouldn’t even use these hacks if you don’t have access … Read more
Why does the code above compile at all? Phone seems unrelated to Roamable to me? yes because Roamable is an interface it might cause a Run-time exception but not compile time exception, because even if Phone doesn’t implement Roamable, a subclass of Phone might, hence the compiler has no way to know it but at … Read more
You have to do two steps. Finding an integral type large enough to store the values. You could use unsigned long, but the values could be negative. Then you could use long but the values could extend into the range of unsigned long. So there is not really a fit-it-all type. There is a trick … Read more
float (*somethingAsMatrix)[2] = (float (*)[2]) matrixReturnAsArray;
There are things that reinterpret_cast can do that no sequence of static_casts can do (all from C++03 5.2.10): A pointer can be explicitly converted to any integral type large enough to hold it. A value of integral type or enumeration type can be explicitly converted to a pointer. A pointer to a function can be … Read more
Here is a simple one-liner: Double[] objects = ArrayUtils.toObject(primitives); You will need to import Apache commons-lang3: import org.apache.commons.lang3.ArrayUtils;
After laravel 5.6, You can individually customize the format of Eloquent date and datetime casting: protected $casts = [ ‘birthday’ => ‘date:Y-m-d’, ‘joined_at’ => ‘datetime:Y-m-d H:00’, ]; This format is used when the model is serialized to an array or JSON data
It’s safe provided the int is zero or positive. If it’s negative, and size_t is of equal or higher rank than int, then the int will be converted to size_t and so its negative value will instead become a positive value. This new positive value is then compared to the size_t value, which may (in … Read more
It’s not a design flaw. Here’s why: Entity entity = new Body(); Body body = (Body) entity; If you were allowed to write your own user-defined conversion here, there would be two valid conversions: an attempt to just do a normal cast (which is a reference conversion, preserving identity) and your user-defined conversion. Which should … Read more
Use IFNULL(column, 0) to convert the column value to zero. Alternatively, the COALESCE function will do the same thing: COALESCE(column, 0), except COALESCE is ANSI-compliant, IFNULL is not COALESCE takes an arbitrary number of columns/values and will return the first non-null value passed to it.