大约有 12,080 项符合查询结果（耗时：0.0224秒） [XML]
How do I create a parameterized SQL query? Why Should I?
I've heard that "everyone" is using parameterized SQL queries to protect against SQL injection attacks without having to vailidate every piece of user input.
...
How to determine equality for two JavaScript objects?
...alue. For example,
function MyClass(a, b)
{
var c;
this.getCLazy = function() {
if (c === undefined) c = a * b // imagine * is really expensive
return c;
}
}
In this above case, c is not really important to determine whether any two instances of MyClass are eq...
Why don't structs support inheritance?
... to access each element of the array, incrementing by a constant amount (sizeof(A)). The assembly would be vaguely like:
for (int i = 0; i < values.Length; ++i)
{
A* value = (A*) (((char*) values) + i * sizeof(A));
value->A *= 2;
}
(Yes, that's abominable assembly, but the point is...
Wait until file is unlocked in .NET
...nswered Sep 8 '08 at 21:59
Eric Z BeardEric Z Beard
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Performance differences between debug and release builds
... allow you to set a breakpoint on a curly brace. The big one is the optimizer that's built into the JIT compiler. I know it makes the following optimizations:
Method inlining. A method call is replaced by the injecting the code of the method. This is a big one, it makes property accessors esse...
Create request with POST, which response codes 200 or 201 and content
...'s arbitrarily what you'd like.
Cache friendly
Finally there's the optimization that I can pre-cache the created resource (because I already have the content; I just uploaded it). The server can return a date or ETag which I can store with the content I just uploaded:
See Section 7.2 for a dis...
How to merge dictionaries of dictionaries?
...oke
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1
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How to convert a data frame column to numeric type?
... 4th column are factor, and the last one is "purely" numeric.
If you utilize transform function, you can convert the fake_char into numeric, but not the char variable itself.
> transform(d, char = as.numeric(char))
char fake_char fac char_fac num
1 NA 1 1 a 1
2 NA ...
Fastest exit strategy for a Panic Button in Crisis/Abuse Websites? [closed]
...ou are going to load remote resources, i suggests you to insert a div with z-index: -1 and some dummy web contents. On click, move their z-index higher to overlap everything on screen.
So if we assume you load a remote resource and with all the unknown variables, we can assume the time taken to be...
Is there a way to get rid of accents and convert a whole string to regular letters?
...
Use java.text.Normalizer to handle this for you.
string = Normalizer.normalize(string, Normalizer.Form.NFD);
// or Normalizer.Form.NFKD for a more "compatable" deconstruction
This will separate all of the accent marks from the characters. Th...