大约有 45,000 项符合查询结果（耗时：0.0451秒） [XML]
Asp.net 4.0 has not been registered
When I try to open my Visual Studio project I get the following error:
13 Answers
13
...
What are the downsides to using Dependency Injection? [closed]
...oing to increase complexity. It's all about balance, which begins with knowing the upsides and downsides. When people say, 'there are no downsides,' it's a sure indicator that they haven't fully understood the thing yet.
– Don Branson
Mar 9 '10 at 18:37
...
Any reason to clean up unused imports in Java, other than reducing clutter?
...list interface.
In Eclipse you can always use a shortcut (depends on OS - Win: Ctrl + SHIFT + O and Mac: COMMAND + SHIFT + O) to organize the imports. Eclipse then cleans up the import section removes all the stale imports etc. If you are needing a imported thing again eclipse will add them automat...
What is base 64 encoding used for?
... to ship across a network, you generally don't do it by just streaming the bits and bytes over the wire in a raw format. Why? because some media are made for streaming text. You never know -- some protocols may interpret your binary data as control characters (like a modem), or your binary data c...
How to print a int64_t type in C
...
@KeithThompson However, since long long is at least 64-bit, printf("%lld", (long long)x); ought to work, except perhaps for -0x8000000000000000, which could not be representable as a long long if that type is not using two's complement.
– Pascal Cuoq
...
How to enable C++11/C++0x support in Eclipse CDT?
...hose steps and it works for me. I am using Eclipse Indigo 20110615-0604 on Windows with a Cygwin setup.
Make a new C++ project
Default options for everything
Once created, right-click the project and go to "Properties"
C/C++ Build -> Settings -> Tool Settings -> GCC C++ Compiler -> Mi...
Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...an example using typical settings for an x86 processor (all used 32 and 64 bit modes):
struct X
{
short s; /* 2 bytes */
/* 2 padding bytes */
int i; /* 4 bytes */
char c; /* 1 byte */
/* 3 padding bytes */
};
struct Y
{
int i; /* 4 bytes */
char ...
ASP.NET Identity's default Password Hasher - How does it work and is it secure?
... * =======================
*
* Version 2:
* PBKDF2 with HMAC-SHA1, 128-bit salt, 256-bit subkey, 1000 iterations.
* (See also: SDL crypto guidelines v5.1, Part III)
* Format: { 0x00, salt, subkey }
*
* Version 3:
* PBKDF2 with HMAC-SHA256, 128-bit salt, 256-bit subkey, 10000 iterations.
* ...
Use 'import module' or 'from module import'?
... from module import * can be particularly useful, if using it as: if(windows):\n\t from module_win import * \n else: \n\t from module_lin import *. Then your parent module can potentially contain OS independent function names, if the function names in module_lin & module_win have same name...
How can I hash a password in Java?
...
You may want to be a bit wary of byte to hex conversions with BigInteger: leading zeros are removed. That's ok for quick debug, but I have seen bugs in production code due to that effect.
– Thomas Pornin
May...