大约有 2,210 项符合查询结果（耗时：0.0273秒） [XML]
Fastest hash for non-cryptographic uses?
...s is:
$loops = 100000;
$str = "ana are mere";
echo "<pre>";
$tss = microtime(true);
for($i=0; $i<$loops; $i++){
$x = crc32($str);
}
$tse = microtime(true);
echo "\ncrc32: \t" . round($tse-$tss, 5) . " \t" . $x;
$tss = microtime(true);
for($i=0; $i<$loops; $i++){
$x = m...
How to check existence of user-define table type in SQL Server 2008?
...
You can look in sys.types or use TYPE_ID:
IF TYPE_ID(N'MyType') IS NULL ...
Just a precaution: using type_id won't verify that the type is a table type--just that a type by that name exists. Otherwise gbn's query is probably better.
...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...下变得异常复杂，你需要为 new task 准备一个 task 信息的 TSS，然而你必须事先要设置好当前的 TSS 块，也就是说，系统中应该有两个 TSS 块：
current TSS
TSS of new task
当前的 TSS 是系统初始化设置好的，这个 TSS 的作用是：当发...
Performing Breadth First Search recursively
...= bfsNumForest(i+1, q)
val (bb, qqq) = qq.dequeue
val (aa, tss) = qqq.dequeue
tss.enqueue[org.dg.collection.BFSNumber.Tree[Int]](Node(i, aa, bb))
}
}
}
def bfsNumTree[T](t: Tree[T]): Tree[Int] = {
val q = Queue.Empty.enqueue[Tree[T]](t)
val qq = bfsNumForest(1, q)
...
Is it possible to search for a particular filename on GitHub?
...
I refined @andy-lester answer with intitle:, i.e. I want to find where's located the file simple_spinner_item.xml in Android's source code hosted on github, so I search on Google this string:
site:github.com intitle:simple_spinner_item.xml github.com/android
...
Django: Set foreign key using integer?
...
Yep:
employee = Employee(first_name="Name", last_name="Name")
employee.type_id = 4
employee.save()
ForeignKey fields store their value in an attribute with _id at the end, which you can access directly to avoid visiting the database.
The _id version of a ForeignKey is a particularly useful as...
What is the difference between user and kernel modes in operating systems?
...ws it. See also: Why doesn't Linux use the hardware context switch via the TSS?
How do programs and operating systems transition between rings?
when the CPU is turned on, it starts running the initial program in ring 0 (well kind of, but it is a good approximation). You can think this initial p...
How does a debugger work?
...dware debugging registers. Following is from that chapter:
T (trap) flag, TSS — Generates a debug exception (#DB) when an attempt is
made to switch to a task with the T flag set in its TSS.
I am not sure whether Window or Linux use this flag or not, but it is very interesting to read that chapte...
Alternative to google finance api [closed]
...MC,SYY,TROW,TGT,TEL,TE,THC,TDC,TSO,TXN,TXT,HSY,TRV,TMO,TIF,TWX,TWC,TJX,TMK,TSS,TSCO,RIG,TRIP,FOXA,TSN,TYC,USB,UA,UNP,UNH,UPS,URI,UTX,UHS,UNM,URBN,VFC,VLO,VAR,VTR,VRSN,VZ,VRTX,VIAB,V,VNO,VMC,WMT,WBA,DIS,WM,WAT,ANTM,WFC,WDC,WU,WY,WHR,WFM,WMB,WIN,WEC,WYN,WYNN,XEL,XRX,XLNX,XL,XYL,YHOO,YUM,ZMH,ZION,ZTS,S...
Should I pass a shared_ptr by reference? [duplicate]
...ime type information is really needed. So something like boost::typeindex::type_id should make things better.
– FrankHB
Sep 21 '15 at 0:52
...