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std::function vs template
...inted out, the optimizer has more troubles to understand std::function and doesn't move the call out of the loop. So 1241ms is a fair measurement for calc2.
Notice that, std::function is able to store different types of callable objects. Hence, it must perform some type-erasure magic for the storag...
Why is Java's Iterator not an Iterable?
Why does the Iterator interface not extend Iterable ?
16 Answers
16
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Save current directory in variable using Bash?
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Using backticks does the same.
– tutuca
Nov 28 '13 at 17:06
1
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How do I create a unique constraint that also allows nulls?
...d 'WHERE'. If I remove the where clause the DDL runs fine, but of course, doesn't do what I need it to. Any ideas?
– Kenneth Baltrinic
Jul 16 '10 at 18:07
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IEnumerable vs List - What to Use? How do they work?
...e to defer evaluation and possibly optimize the program. Remember how LINQ doesn't generate the SQL to query the database until you enumerate it? Consider this:
public IEnumerable<Animals> AllSpotted()
{
return from a in Zoo.Animals
where a.coat.HasSpots == true
sele...
How do I edit an existing tag message in git?
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Does this maintain the original tag's date?
– James M. Greene
May 22 '13 at 16:06
17
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Transaction isolation levels relation with locks on table
...sion of the A record is 3.
When the T1 transaction is rolled back, it does not matter if the 2,
the T1 transaction version, is not applied to the A record. After
that, if the T2 transaction is committed, the 3, the T2 transaction
version, will be applied to the A record. If the T1 transac...
jQuery & CSS - Remove/Add display:none
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The problem is, .show() does nor remove display: none, but instead put display: block or inline depending on the element, and it can break the layout if the element use an unusual display style.
– lolesque
Jun ...
dynamic_cast and static_cast in C++
...fically as they pertain to pointers. This is just a 101-level rundown, it does not cover all the intricacies.
static_cast< Type* >(ptr)
This takes the pointer in ptr and tries to safely cast it to a pointer of type Type*. This cast is done at compile time. It will only perform the cast if...
Best way to show a loading/progress indicator?
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Not sure, but does the progressBar run always in background(just hidden from the UI) after making it invisible?
– Shambhu
May 15 '18 at 6:43
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