大约有 11,643 项符合查询结果（耗时：0.0271秒） [XML]
Why does InetAddress.isReachable return false, when I can ping the IP address?
...achine
// openPort = 22 - ssh, 80 or 443 - webserver, 25 - mailserver etc.
try {
try (Socket soc = new Socket()) {
soc.connect(new InetSocketAddress(addr, openPort), timeOutMillis);
}
return true;
} catch (IOException ex) {
return false;
}...
What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA?
...with additional methods like flush(), saveAndFlush(), and deleteInBatch(), etc.
Return type of saveAll() method is a List.
Use Case - To perform CRUD as well as batch operations, define repository extends JpaRepository.
sha...
Count rows with not empty value
...t by using some extra formulas like containing some concatinate/split/join etc, ill get back to you if i solve it.
– consideRatio
Jan 9 '15 at 23:18
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Why does i = i + i give me 0?
...
@oOTesterOo It starts of printing 2, 4 etc but it very quickly reaches the maximum value of the integer and it "wraps around" to negative numbers, once it reaches zero it stays at zero forever
– Richard Tingle
Jun 11 '14 at 2...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...收和重用那些TIME_WAIT的资源。
下面来看一下我们网管对/etc/sysctl.conf文件的修改：
#对于一个新建连接，内核要发送多少个 SYN 连接请求才决定放弃,不应该大于255，默认值是5，对应于180秒左右时间
net.ipv4.tcp_syn_retries=2
#net.ip...
What's the “average” requests per second for a production web application?
...y make per second
c. the number of additional requests (i.e. ajax calls, etc)
As to what is considered fast.. do you mean how few requests a site can take? Or if a piece of hardware is considered fast if it can process xyz # of requests per second?
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
...ng out that the actual source is available now. none of the other answers/etc had a link to the actual source :D
– John Gardner
Jun 3 '16 at 17:32
1
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What are best practices for validating email addresses on iOS 2.0
... ; "]", or "\"
Yes, that means +, ', etc are all legit.
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How to split a string in Java
...h needs regular expression construction and matching. Extra array created, etc.
– David
Jan 17 '19 at 23:38
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How can I make a Python script standalone executable to run without ANY dependency?
...staller and others (py2exe, freeze, cython, embedded version of python and etc) still can't handle dependency of the python dynamic library itself at least in the Windows (python*.dll). The dll has dependency on the runtime which HAS TO BE installed separately. After the process you gain the executa...