大约有 30,000 项符合查询结果（耗时：0.0449秒） [XML]
Best practices for SQL varchar column length [closed]
...olumn as VARCHAR(100) or VARCHAR(500).
You should see the max length provided for a VARCHAR column as a kind of constraint (or business rule) rather than a technical/physical thing.
For PostgreSQL the best setup is to use text without a length restriction and a CHECK CONSTRAINT that limits the nu...
Should I call Close() or Dispose() for stream objects?
... StreamWriter etc implements IDisposable interface. That means, we can call Dispose() method on objects of these classes. They've also defined a public method called Close() . Now that confuses me, as to what should I call once I'm done with objects? What if I call both?
...
Best way to implement request throttling in ASP.NET MVC?
...ation,
CacheItemPriority.Low,
null); // no callback
allowExecute = true;
}
if (!allowExecute)
{
if (String.IsNullOrEmpty(Message))
Message = "You may only perform this action every {n} seconds.";
...
what does the __file__ variable mean/do?
...detail from other answers: __file__ is NOT defined in all cases, e.g. statically linked C modules. We can't count on __file__ always being available.
– Chris Johnson
Feb 18 '14 at 15:46
...
Can I call a base class's virtual function if I'm overriding it?
...r : public Foo {
// ...
void printStuff() {
Foo::printStuff(); // calls base class' function
}
};
share
|
improve this answer
|
follow
|
...
How to use Greek symbols in ggplot2?
...rates a lot of warnings, about a hundred lines of: Warning message in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y, : “conversion failure on '>3σ' in 'mbcsToSbcs': dot substituted for <cf>
– Patafikss
Feb 5 at 11:39
...
ASP.NET Repeater bind List
...t null values you may want to refactor to this (.NET 6+)
<asp:Repeater ID="repeater" runat="server">
<ItemTemplate>
<%# Container.DataItem?.ToString() ?? string.Empty%>
</ItemTemplate>
</asp:Repeater>
Note if you are using less than .NET 6 you cannot ...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
... string value = "Hello World!";
MockFoo mockFoo;
EXPECT_CALL(mockFoo, getArbitraryString()).Times(1).
WillOnce(Return(value));
string returnValue = mockFoo.getArbitraryString();
cout << "Returned Value: " << returnValue << endl;
retur...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...omewhat faster than sqrtss.
edit: If speed is critical, and you're really calling this in a loop for many values, you should be using the vectorized versions of these instructions, rsqrtps or sqrtps, both of which process four floats per instruction.
...
Why does GCC generate such radically different assembly for nearly the same C code?
...oesn't answer the most important question, "Why does GCC generate such radically different assembly".)
– orlp
Apr 20 '12 at 18:24
...