大约有 47,000 项符合查询结果（耗时：0.0277秒） [XML]
Efficiency of premature return in a function
...iction or for some other issue where the platform determines the preferred ordering.
– Steve314
Oct 25 '11 at 9:55
6
...
C# constructor execution order
...
The order is:
Member variables are initialized to default values for all classes in the hierarchy
Then starting with the most derived class:
Variable initializers are executed for the most-derived type
Constructor chaining ...
How to initialize all members of an array to the same value?
...),
_ITEM(ERR_FAIL),
_ITEM(ERR_MEMORY)
};
This keeps things in order, even if you happen to write some of the enum-values out of order.
More about this technique can be found here and here.
share
|
...
SQL JOIN and different types of JOINs
... a.actor_id -- JOIN predicate with the outer query!
GROUP BY f.film_id
ORDER BY revenue DESC
LIMIT 5
) AS f
ON true
It will find the TOP 5 revenue producing films per actor. Every time you need a TOP-N-per-something query, LATERAL JOIN will be your friend. If you're a SQL Server person, then...
Way to go from recursion to iteration
... you have more than one recursive call inside and you want to preserve the order of the calls, you have to add them in the reverse order to the stack:
foo(first);
foo(second);
has to be replaced by
stack.push(second);
stack.push(first);
Edit: The article Stacks and Recursion Elimination (or Articl...
how to read System environment variable in Spring applicationContext
...Denv=QA should solve your problem.
Note also a comment by @yiling:
In order to access system environment variable, that is OS level
variables as amoe commented, we can simply use "systemEnvironment"
instead of "systemProperties" in that EL. Like
#{systemEnvironment['ENV_VARIABLE_NAME']}
...
Where to put include statements, header or source?
...fic requirements that you #include a certain set of headers (in a specific order). Some extremely traditional C programmers still follow this model (religiously, in at least some cases).
More recently, there's a movement toward making most headers standalone. If that header requires something else,...
Export database schema into SQL file
...ME
WHERE inf.TABLE_NAME = @TableName and inf.TABLE_SCHEMA=@schema
ORDER BY inf.ORDINAL_POSITION
'
print @sql
INSERT INTO @ShowFields( DatabaseName
,TableOwner
,TableName
,Fie...
What is a mixin, and why are they useful?
...
This particular example could have been achieved via the functools.total_ordering() decorator, but the game here was to reinvent the wheel:
import functools
@functools.total_ordering
class Integer(object):
def __init__(self, i):
self.i = i
def __le__(self, other):
return s...
In .NET, which loop runs faster, 'for' or 'foreach'?
...
ctford: No it's not. The compiler certainly cannot reorder elements in foreach. foreach is not at all related to functional programming. It's totally an imperative paradigm of programming. You are mis-attributing things happening in TPL and PLINQ to foreach.
...