大约有 40,000 项符合查询结果（耗时：0.0328秒） [XML]
What is the correct answer for cout
...ce result b, which outputs 01.
See P0145R3 Refining Expression Evaluation Order for Idiomatic C++ for more details.
share
|
improve this answer
|
follow
|
...
Return 0 if field is null in MySQL
... Would that be IFNULL((SELECT SUM(uop.price * uop.qty) FROM uc_order_products uop WHERE uo.order_id = uop.order_id) AS products_subtotal, 0)?
– Kevin
Oct 22 '10 at 13:46
...
MySQL Data - Best way to implement paging?
...
When using LIMIT for paging you should also specify an ORDER BY.
– Mark Byers
Sep 26 '10 at 18:42
...
Dynamic Sorting within SQL Stored Procedures
...eah, it's a pain, and the way you're doing it looks similar to what I do:
order by
case when @SortExpr = 'CustomerName' and @SortDir = 'ASC'
then CustomerName end asc,
case when @SortExpr = 'CustomerName' and @SortDir = 'DESC'
then CustomerName end desc,
...
This, to me, is still much ...
What's the difference between streams and datagrams in network programming?
...the server. There is a guarantee that data will not arrive in a different order than you sent it, and there is a reasonable guarantee that data will not be damaged.
A datagram socket is like passing a note in class. Consider the case where you are not directly next to the person you are passing t...
How to get the top 10 values in postgresql?
...
For this you can use limit
select *
from scores
order by score desc
limit 10
If performance is important (when is it not ;-) look for an index on score.
Starting with version 8.4, you can also use the standard (SQL:2008) fetch first
select *
from scores
order by scor...
A 'for' loop to iterate over an enum in Java
...se of lambda and streams (Tutorial):
Stream.of(Direction.values()).forEachOrdered(System.out::println);
Why forEachOrdered and not forEach with streams ?
The behaviour of forEach is explicitly nondeterministic where as the forEachOrdered performs an action for each element of this stream, in t...
Sorting a vector of custom objects
...
Edit2: As Kappa suggests you can also sort the vector in the descending order by overloading a > operator and changing call of sort a bit:
struct MyStruct
{
int key;
std::string stringValue;
MyStruct(int k, const std::string& s) : key(k), stringValue(s) {}
bool operator...
How can I retrieve Id of inserted entity using Entity framework? [closed]
...here in-case people are looking to "solve" the problem I had.
Consider an Order object that has foreign key relationship with Customer. When I added a new customer and a new order at the same time I was doing something like this;
var customer = new Customer(); //no Id yet;
var order = new Order();...
Why would anyone use set instead of unordered_set?
C++0x is introducing unordered_set which is available in boost and many other places. What I understand is that unordered_set is hash table with O(1) lookup complexity. On the other hand, set is nothing but a tree with log(n) lookup complexity. Why on earth would anyone use set instead ...