大约有 16,000 项符合查询结果（耗时：0.0424秒） [XML]
Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable?
...r find the best query plan. There are many person-years of effort that go into developing a SQL engine, so let the engineers do what they know how to do.
Of course, there are situations where the query plan is not optimal. Then you want to use query hints, restructure the query, update statistics...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ns often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex ...
Multi-line EditText with Done action button
...ttrs);
}
public ActionEditText(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
@Override
public InputConnection onCreateInputConnection(EditorInfo outAttrs)
{
InputConnection conn = super.onCreateInputConnection(outAttrs);
...
How to delete cookies on an ASP.NET website
... Aha, looks like it only creates a cookie for the Response object. Interesting :)
– Andomar
Jul 9 '11 at 15:06
3
...
How to compare arrays in C#? [duplicate]
...urn false;
var comparer = EqualityComparer<T>.Default;
for (int i = 0; i < a1.Length; i++)
{
if (!comparer.Equals(a1[i], a2[i])) return false;
}
return true;
}
.NET 3.5 or higher solution
Or use SequenceEqual if Linq is available for you (.NET Framework >=...
How to format strings in Java
...you've provided and you can use it for parsing as well.
For example:
int someNumber = 42;
String someString = "foobar";
Object[] args = {new Long(someNumber), someString};
MessageFormat fmt = new MessageFormat("String is \"{1}\", number is {0}.");
System.out.println(fmt.format(args));
A nice...
Best way to implement keyboard shortcuts in a Windows Forms application?
... for it to be exclusively called by an event) or refactor the common logic into a separate method.
– Hans Passant
Jun 10 '14 at 11:26
15
...
How to detect incoming calls, in an Android device?
...ation-->
<receiver android:name=".CallReceiver" >
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGO...
String comparison: InvariantCultureIgnoreCase vs OrdinalIgnoreCase? [duplicate]
...perty treats
the characters in the strings to
compare as if they were converted
to uppercase using the conventions
of the invariant culture, and then
performs a simple byte comparison
that is independent of language.
This is most appropriate when
comparing strings that are generated...
How can I do a case insensitive string comparison?
...
@ErikE: You don't understand my point of view. Old answers corresponds the time of writing. One should not touch old answers. It's true about the most products. The best practice or the best choice from performance point of view can be changed multiple times ...