大约有 40,000 项符合查询结果（耗时：0.0499秒） [XML]
How do I pass a unique_ptr argument to a constructor or a function?
... Value
Base(std::unique_ptr<Base> n)
: next(std::move(n)) {}
In order for the user to call this, they must do one of the following:
Base newBase(std::move(nextBase));
Base fromTemp(std::unique_ptr<Base>(new Base(...));
To take a unique pointer by value means that you are transfer...
Java's final vs. C++'s const
...would do:
class Bar {
public:
virtual void foo() const final;
};
(The order of const and final here is required).
Previously there wasn't a direct equivalent of const member functions although making functions non-virtual would be a potential option albeit without causing an error at compile t...
Where is Java's Array indexOf?
...here are four considerations:
The array must be sorted either in natural order or in the order of a Comparator that you provide as an argument, or at the very least all elements that are "less than" the key must come before that element in the array and all elements that are "greater than" the key...
CharSequence VS String in Java?
...ple, look at the Java Collections Framework. If your API gives or takes an ordered collection of objects, declare your methods as using List rather than ArrayList, LinkedList, or any other 3rd-party implementation of List.
When writing a quick-and-dirty little method to be used only by your code i...
Why are C# 3.0 object initializer constructor parentheses optional?
..., and able to be readily referred to. Shall we instead contact directly in order to choreograph a staged SO post / answer dance? :)
– James Dunne
Sep 7 '10 at 17:53
5
...
Postgres unique constraint vs index
...ion (not only on column) and define some other parameters (collation, sort order, NULLs placement).
You cannot add table constraint using partial index.
alter table master add column part_id integer;
create unique index master_partial_idx on master (part_id) where part_id is not null;
alter table...
How to enable Heap updates on my android client
... In eclipse you have to click Window -> Open Perspective -> DDMS, in order to open the DDMS perspective. There you have a lot of windows popping up - including a devices tab (the one that they're talking about).
– AgentKnopf
Mar 26 '12 at 6:46
...
Selecting the last value of a column
...
Both instances of ROW can be replaced by COLUMN in order to return the last value in a particular row (instead of the last value in a particular column).
– Jon Schneider
Mar 10 '13 at 4:29
...
SQL Server String or binary data would be truncated
...ths may all match, but perhaps you are specifying the columns in the wrong order in your SELECT statement. Say tableX and tableY have columns with the same name, but in different order
share
|
impr...
Why do you create a View in a database?
...base in which some of the entities were person, company, role, owner type, order, order detail, address and phone, where the person table stored both employees and contacts and the address and phone tables stored phone numbers for both persons and companies, and the development team were tasked with...