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Generic method multiple (OR) type constraint
...
Or the compiler could threat the type as an union type within the function and have the return value be of the same type that it gets in. TypeScript does this.
– Alex
Jan 30 '18 at 18:42
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List of Big-O for PHP functions
...:
isset/array_key_exists is much faster than in_array and array_search
+(union) is a bit faster than array_merge (and looks nicer). But it does work differently so keep that in mind.
shuffle is on the same Big-O tier as array_rand
array_pop/array_push is faster than array_shift/array_unshift due t...
Haskell Type vs Data Constructor
...nstructed in nearly any language", says Wikipedia. :) In e.g. C/++, that's unions, with a tag discipline. :)
– Will Ness
Aug 17 '13 at 20:38
5
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How to print register values in GDB?
...ax
# $1 = 0
set $eax = 1
p $eax
# $2 = 1
This syntax can also be used to select between different union members e.g. for ARM floating point registers that can be either floating point or integers:
p $s0.f
p $s0.u
From the docs:
Any name preceded by ‘$’ can be used for a convenience vari...
What does {0} mean when initializing an object?
..., a null pointer for pointers).
For non-scalar types (structures, arrays, unions), {0} specifies that the first element of the object is initialized to zero. For structures containing structures, arrays of structures, and so on, this is applied recursively, so the first scalar element is set to the...
Why do you use typedef when declaring an enum in C++?
...amespaces but that is not technically correct. It has three:
Tags (enum, union, and struct)
Labels
(everything else)
typedef enum { } XYZ; declares an anonymous enumeration and imports it into the global namespace with the name XYZ.
typedef enum ABC { } XYZ; declares an enum named ABC in the ta...
conditional unique constraint
... CheckActiveCount(
@Id INT
) RETURNS INT AS BEGIN
DECLARE @ret INT;
SELECT @ret = COUNT(*) FROM CheckConstraint WHERE Id = @Id AND RecordStatus = 1;
RETURN @ret;
END;
GO
ALTER TABLE CheckConstraint
ADD CONSTRAINT CheckActiveCountConstraint CHECK (NOT (dbo.CheckActiveCount(Id) > 1 AND...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...ot reflected in expressions)
intersection types | implicit conjunction
union types | implicit disjunction
open code | temporal next
closed code | necessity
effects | possibility
reachable state | possible world
monadic metalanguage | lax...
Variable declaration placement in C
...ly if the curlies are part of a block (not if they are part of a struct or union declaration or a braced initializer.)
– Jens
Jun 18 '13 at 19:39
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How to get the current time as datetime
...thing similar to let components = calendar.components(.NSCalendarUnit.Year.union(NSCalendarUnit.Minute), fromDate: date), the vertical slash cant be used here anymore.
– Hola Soy Edu Feliz Navidad
Jun 24 '15 at 19:09
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