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Get OS-level system information
I'm currently building a Java app that could end up being run on many different platforms, but primarily variants of Solaris, Linux and Windows.
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How to specify JVM maximum heap size “-Xmx” for running an application with “run” action in SBT?
...oes large data arrays processing and needs more memory than JVM gives by default. I know in Java it's specified by "-Xmx" option. How do I set SBT up to use particular "-Xmx" value to run an application with "run" action?
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What is the difference between require() and library()?
What is the difference between require() and library() ?
8 Answers
8
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What is the difference between HAVING and WHERE in SQL?
What is the difference between HAVING and WHERE in an SQL SELECT statement?
20 Answers
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Can I invoke an instance method on a Ruby module without including it?
I have a module which declares a number of instance methods
10 Answers
10
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What is the IntelliJ shortcut to create a local variable?
In Eclipse if you have a method:
3 Answers
3
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Good tutorials on XMPP? [closed]
I've been looking at some open-source XMPP servers, and am familiar with the official page http://xmpp.org/ . But thus far I've not found anything in between " The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication " and a list of XEP specifications....
Why aren't pointers initialized with NULL by default?
...e developer did not do it at the declaration point was he/she needed to perform some operation and then assign.
So now we have the situation that the compiler has added an extra instruction to the code that initializes the variable to NULL then later the developer code is added to do the correct in...
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
...中，会经常用到下面的命令：
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
它会显示例如下面的信息：
TIME_WAIT 814
CLOSE_WAIT 1
FIN_WAIT1 1
ESTABLISHED 634
SYN_RECV 2
LAST_ACK 1
常用的三个状态是：ESTABLISHED 表示正在通信，...
What are best practices for validating email addresses on iOS 2.0
...o validate an email address explains in great detail that the grammar specified in RFC 5322 is too complicated for primitive regular expressions.
I recommend a real parser approach like MKEmailAddress.
As quick regular expressions solution see this modification of DHValidation:
- (BOOL) validat...