大约有 16,000 项符合查询结果（耗时：0.0238秒） [XML]
What is the difference between char s[] and char *s?
... here is that
char *s = "Hello world";
will place "Hello world" in the read-only parts of the memory, and making s a pointer to that makes any writing operation on this memory illegal.
While doing:
char s[] = "Hello world";
puts the literal string in read-only memory and copies the string t...
Bash: infinite sleep (infinite blocking)
...p. (On my Ubuntu64 16.10 this adds several 10 syscalls per second on an already busy system.)
The question was for a blocking command
Unfortunately, there is no such thing ..
Read: I do not know any way to archive this with the shell directly.
Everything (even sleep infinity) can be interrupted...
Reading settings from app.config or web.config in .NET
I'm working on a C# class library that needs to be able to read settings from the web.config or app.config file (depending on whether the DLL is referenced from an ASP.NET web application or a Windows Forms application).
...
Error Code: 2013. Lost connection to MySQL server during query
...or me it was under Edit → Preferences → SQL Editor → DBMS connection read time out (in seconds): 600
Changed the value to 6000.
Also unchecked limit rows as putting a limit in every time I want to search the whole data set gets tiresome.
...
Check if object is file-like in Python
...e objects are objects in Python that behave like a real file, e.g. have a read() and a write method(), but have a different implementation. It is and realization of the Duck Typing concept.
...
Split output of command by columns using Bash?
... Linux you could simply do xargs -0n1 </proc/$PID/cmdline | head -n1 or readlink /proc/$PID/exe, but anyhow...
– ephemient
Oct 27 '09 at 16:09
...
How do I read image data from a URL in Python?
...ks for that now and does the BytesIO wrapping under the hood. From: pillow.readthedocs.io/en/3.0.x/releasenotes/2.8.0.html
– Vinícius M
Feb 6 at 15:21
...
Generating an MD5 checksum of a file
...on't be able to fit the whole file in memory. In that case, you'll have to read chunks of 4096 bytes sequentially and feed them to the md5 method:
import hashlib
def md5(fname):
hash_md5 = hashlib.md5()
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
...
How to kill a child process after a given timeout in Bash?
...ut (sudo apt-get install timeout) and use it like: (most Systems have it already installed otherwise use sudo apt-get install coreutils)
timeout 10 ping www.goooooogle.com
If you don't want to download something, do what timeout does internally:
( cmdpid=$BASHPID; (sleep 10; kill $cmdpid) & ...
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
... to set "slave okay" mode to let the mongo shell know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondari...