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Diff output from two programs without temporary files
... use >(command) if you want to pipe something into a command.
This is called "Process Substitution" in Bash's man page.
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A non-blocking read on a subprocess.PIPE in Python
...hat everything does and don't copy it blindly, even if it just works! (Actually the simplest solution is to use a thread and do a readline as Seb did, Qeues are just an easy way to get the data, there are others, threads are the answer!)
– Aki
Feb 22 '12 at 13:...
Node.js check if file exists
...ter a minute search try this :
var path = require('path');
path.exists('foo.txt', function(exists) {
if (exists) {
// do something
}
});
// or
if (path.existsSync('foo.txt')) {
// do something
}
For Node.js v0.12.x and higher
Both path.exists and fs.exists have been de...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...O 的客户端），底行使用 1000 个。所有图形都有一个对数 fd 轴，以合理地显示 100 到 100000 的大范围文件描述符编号（实际上，它的实际套接字对，因此实际上进程中的文件描述符数量是原来的两倍）。
讨论
与 libev 相比，li...
Linux: is there a read or recv from socket with timeout?
...has
blocked for this much time without
receiving additional data, it shall
return with a partial count or errno
set to [EAGAIN] or [EWOULDBLOCK] if no
data is received. The default for this
option is zero, which indicates that a
receive operation shall not time out.
This option takes...
Is explicitly closing files important?
In Python, if you either open a file without calling close() , or close the file but not using try - finally or the " with " statement, is this a problem? Or does it suffice as a coding practice to rely on the Python garbage-collection to close all files? For example, if one does this:
...
Is MD5 still good enough to uniquely identify files?
...a file still considered a good enough method to uniquely identify it given all the breaking of MD5 algorithm and security issues etc? Security is not my primary concern here, but uniquely identifying each file is.
...
What characters do I need to escape in XML documents?
...ted at the W3C Markup Validation Service.
Text
The safe way is to escape all five characters in text. However, the three characters ", ' and > needn't be escaped in text:
<?xml version="1.0"?>
<valid>"'></valid>
Attributes
The safe way is to escape all five characters i...
Moving from CVS to Git: $Id$ equivalent?
... for example, you packaged a version file with the source (or even rewrote all the content for distribution) to show that number. Let's say that packaged version was 2.2-12-g6c4ae7a (not a release, but a valid version).
You can now see exactly how far behind you are (4 commits), and you can see exa...
MFC CString与std::string互转 - C/C++ - 清泛网 - 专注C/C++及内核技术
...cstr);
cstr = CString( stdstr.data() );
Unicode：
stdstr.assign( CT2A ( (LPCTSTR) cstr )); 或者 stdstr = std::string( CT2A ( (LPCTSTR) cstr ));
cstr = CString( stdstr.data() );MFC CString std::string 互转