大约有 16,000 项符合查询结果（耗时：0.0303秒） [XML]
Why does the C# compiler not fault code where a static method calls an instance method?
...
UPDATE: Below answer was written in 2012, before the introduction of C# 7.3 (May 2018). In What's new in C# 7.3, the section Improved overload candidates, item 1, it is explained how the overload resolution rules have changed so that non-static overloads are discarded early. So...
Using printf with a non-null terminated string
...ich is NOT null terminated and you know its exact size, so how can you print that string with printf in C? I recall such a method but I can not find out now...
...
What is a good Hash Function?
... informative link! I know a few analyses by Bob Jenkins and others which point to quite good universally acceptable hash functions but I haven't come across this one yet.
– Konrad Rudolph
Jul 2 '09 at 6:36
...
Differences between Perl and PHP [closed]
...rators. In Perl, if you use <, >, ==, !=, <=>, and so on, Perl converts both operands to numbers. If you want to convert as strings instead, you have to use lt, gt, eq, ne, cmp (the respective equivalents of the operators listed previously). Examples where this will really get you:
if (...
Parse (split) a string in C++ using string delimiter (standard C++)
... from one string: <code>size_t last = 0; size_t next = 0; int index = 0; while (index<4) { next = str.find(delimiter, last); auto number = str.substr(last, next - last); IPv4[index++] = atoi(number.c_str()); last = next + 1; }</code>
...
Most efficient way to increment a Map value in Java
...suggested by Hank Gay
the "Trove" method suggested by jrudolph
the "MutableInt" method suggested by phax.myopenid.com
Method
Here's what I did...
created five classes that were identical except for the differences shown below. Each class had to perform an operation typical of the scenario I pre...
How do I change the data type for a column in MySQL?
I want to change the data type of multiple columns from float to int. What is the simplest way to do this?
9 Answers
...
close vs shutdown socket?
...ion (with SHUT_WR, and if you don't care about receiving data after this point, with SHUT_RD as well), and wait until you receive a 0 size data, and then close the socket.
In any case, if any other error occurred (timeout for example), simply close the socket.
Ideal implementations for SHUT_RD and...
Encrypt Password in Configuration Files? [closed]
...ing testing, but it also makes it easier for brute force attackers
int iterationCount = 40000;
// Other values give me java.security.InvalidKeyException: Illegal key size or default parameters
int keyLength = 128;
SecretKeySpec key = createSecretKey(password.toCharArr...
boost::flat_map and its performance compared to map and unordered_map
... you need to benchmark using RDTSC, and time stuff calling them once only.
Intel has made a paper describing how to use RDTSC (using a cpuid instruction to flush the pipeline, and calling it at least 3 times at the beginning of the program to stabilize it).
2) RDTSC accuracy measure
I also recomme...