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'size_t' vs 'container::size_type'
..." At the time, size_t was the bet practical implementation of those constraints. However, in C++11, it is now defined essentially as: std::make_unsigned<X::difference_type>::type by default. Which in practice, will probably be the same or compatible with size_t.
– Evan Te...
How can I use Async with ForEach?
...for the same reasons).
In this case, I recommend projecting each element into an asynchronous operation, and you can then (asynchronously) wait for them all to complete.
using (DataContext db = new DataLayer.DataContext())
{
var tasks = db.Groups.ToList().Select(i => GetAdminsFromGroupAsyn...
printf format specifiers for uint32_t and size_t
...he same as unsigned long (possibly 64 bits) when it's actually an unsigned int (32 bits). Try using %zu in both cases.
I'm not entirely certain though.
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Why are const parameters not allowed in C#?
...good answers, I'll add yet another reason why to not put C-style constness into C#. You said:
we mark parameter as const in order to be sure that its state will not be changed in method.
If const actually did that, that would be great. Const doesn't do that. The const is a lie!
Const doesn't...
C++: What is the size of an object of an empty class?
...rely could not be 0 bytes since it should be possible to reference and point to it like any other object. But, how big is such an object?
...
Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...ainst the scalaz-stream API. This is a newer stream processing API that is intended to replace iteratee.
For completeness, here's the test code:
// create a stream containing `n` arrays with `sz` Ints in each one
def streamArrs(sz: Int, n: Int): Process[Task, Array[Int]] =
(Process emit Array.fi...
do { … } while (0) — what is it good for? [duplicate]
...an if statement would require that you omit the semicolon, which is counterintuitive:
if (condition)
FOO(x)
else
...
If you define FOO like this:
#define FOO(x) do { foo(x); bar(x); } while (0)
then the following is syntactically correct:
if (condition)
FOO(x);
else
....
...
string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
...lOrWhiteSpace(String value) {
if (value == null) return true;
for(int i = 0; i < value.Length; i++) {
if(!Char.IsWhiteSpace(value[i])) return false;
}
return true;
}
Examples
string nullString = null;
string emptyString = "";
string whitespaceString = " ";
string n...
How to change identity column values programmatically?
...hen switch back.
Assuming the following structure
CREATE TABLE Test
(
ID INT IDENTITY(1,1) PRIMARY KEY,
X VARCHAR(10)
)
INSERT INTO Test
OUTPUT INSERTED.*
SELECT 'Foo' UNION ALL
SELECT 'Bar' UNION ALL
SELECT 'Baz'
Then you can do
/*Define table with same structure but no IDENTITY*/
CREATE TAB...
View's getWidth() and getHeight() returns 0
...ew View(this) {
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
view.getHeight(); //height is ready
}
};
Also mind, that onLayout will be called many times, so be considerate what you do in the method,...