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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
...明文的形式写到证书里面，然后用一个指纹算法(SHA1或者MD5 )计算出这些数字证书内容的一个指纹(摘要)，并把指纹和指纹算法用自己的私钥D进行加密，然后和证书的内容一起发给Amazon.com。
Symantec(CA) 把私钥B给Amazon.com.
如何使...
How can I iterate over an enum?
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for ( int fooInt = One; fooInt != Last; fooInt++ )
{
Foo foo = static_cast<Foo>(fooInt);
// ...
}
Please note, the enum Last is meant to be skipped by the iteration. Utilizing this "fake" Last enum, you don't have to update your terminating condition in the for loop to the last "real...
What would be C++ limitations compared C language? [closed]
..._t) );
To make it compile as C++ you have to write:
foo_t* foo = static_cast<foo_t*>( malloc ( sizeof(foo_t) ) );
which isn't valid C any more. (you could use the C-style cast, it which case it would compile in C, but be shunned by most C++ coding standards, and also by many C programmers...
How do you get assembler output from C/C++ source in gcc?
...+ from a DOS window on Win-XP, against a routine that contains an implicit cast
c:\gpp_code>g++ -g -O -Wa,-aslh horton_ex2_05.cpp >list.txt
horton_ex2_05.cpp: In function `int main()':
horton_ex2_05.cpp:92: warning: assignment to `int' from `double'
The output is asssembled generated code i...
php stdClass to array
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@hakre It doesn't seem like it's NULL after casting it as an array. I think OP means that it's NULL after using json_decode($array) which makes sense per the manual. NULL is returned if the json cannot be decoded
– h2ooooooo
Sep 2...
C# vs Java generics [duplicate]
...ompiled classes are not actually generic. They compile down to Object and casts. In effect Java generics are a compile time artifact and can easily be subverted at runtime.
C# on the other hand, by virtue of the CLR, implement generics all they way down to the byte code. The CLR took several b...
Android Studio - Ambiguous method call getClass()
....
Have a look at the Error report
The only workaround to this issue is to cast the instance you call getClass() on, to Object as follows:
((Object) this).getClass()
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What does void mean in C, C++, and C#?
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Not disagreeing, but an additional use of void is in the "cast to void" trick to suppress warnings for unused values. It's a bit of a stretch since it doesn't really correspond with how the compiler interprets things, but you can interpret that to mean "I'm using this value to do no...
converting double to integer in java
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is there a possibility that casting a double created via Math.round() will still result in a truncated down number
No, round() will always round your double to the correct value, and then, it will be cast to an long which will truncate any decimal plac...
How to check the version before installing a package using apt-get?
...ow the version details.
It also shows which version is currently installed and which versions are available to install.
For example, apt-cache policy hylafax+
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