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What is “Orthogonality”?
...
From Eric S. Raymond's "Art of UNIX programming"
Orthogonality is one of the most important properties that can help make even complex designs compact. In a purely orthogonal design, operations do not have side effects; each action (whether it's an API...
How do I change the working directory in Python?
...g directory of the current process. This is lost when you exit back to the Unix shell. If desperate you can change the parent shell directory on Unix with this horrible hack:
def quote_against_shell_expansion(s):
import pipes
return pipes.quote(s)
def put_text_back_into_terminal_input_buff...
How to determine CPU and memory consumption from inside a process?
... Platforms
I would assume, that some of the Linux code also works for the Unixes, except for the parts that read the /proc pseudo-filesystem. Perhaps on Unix these parts can be replaced by getrusage() and similar functions?
If someone with Unix know-how could edit this answer and fill in the detail...
How do I alias commands in git?
...the git config alias command:
$ git config --global alias.st status
On unix, use single quotes if the alias has a space:
$ git config --global alias.ci 'commit -v'
On windows, use double quotes if the alias has a space or a command line argument:
c:\dev> git config --global alias.ci "comm...
how to find host name from IP with out login to the host
i need to find the host name of a UNIX host whose IP is known with out login to that UNIX host
11 Answers
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Postgresql: password authentication failed for user “postgres”
...l/9.3/main/pg_hba.conf
Change all authentication methods to trust. Change Unix Password for "postgres" user. Restart Server. Login with psql -h localhost -U postgres and use the just set Unix password. If it works you can re-set the pg_hba.conf file to the default values.
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How do I automatically scroll to the bottom of a multiline text box?
... {
if(System.Environment.OSVersion.Platform != System.PlatformID.Unix)
SendMessage(tb.Handle, WM_VSCROLL, new System.IntPtr(SB_BOTTOM), System.IntPtr.Zero);
}
}
VB.NET:
Public Class Utils
<System.Runtime.InteropServices.DllImport("user32.dll", CharSet := System...
Get the time difference between two datetimes
...ing it; this results in moment() interpreting it as a time relative to the Unix epoch.
It doesn't give you exactly the format you're looking for, but
moment.duration(now.diff(then)).humanize()
would give you a useful format like "40 minutes". If you're really keen on that specific formatting, you...
When should one use a spinlock instead of mutex?
... level >= DISPATCH LEVEL), you cannot use mutex but rather spinlock.
On unix - same thing.
Here is equivalent question on competitor stackexchange unix site:
https://unix.stackexchange.com/questions/5107/why-are-spin-locks-good-choices-in-linux-kernel-design-instead-of-something-more
Info on di...
[精华] VC中BSTR、Char和CString类型的转换 - C/C++ - 清泛网 - 专注C/C++及内核技术
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另外，又有两个BSTR的包容类_bstr_t和CComBSTR，它们是为了编程者使用BSTR更加方便，因为在他们的构造函数中都调用了SysAllocString，析构函数调用了SysFreeString，然而使用这两个类时仍然需要特别注意，否则也会导致不可预知的错...