大约有 40,000 项符合查询结果（耗时：0.0587秒） [XML]
How to use shared memory with Linux in C
... exit(1);
}
/* make the key: */
if ((key = ftok("hello.txt", 'R')) == -1) /*Here the file must exist */
{
perror("ftok");
exit(1);
}
/* create the segment: */
if ((shmid = shmget(key, SHM_SIZE, 0644 | IPC_CREAT)) == -1) {
perror("shmget");
...
What do the f and t commands do in Vim?
...cursor to, but excluding, the previous = (dT=) and so on…
See :h motion.txt. It will blow your mind.
share
|
improve this answer
|
follow
|
...
Assigning a variable NaN in python without numpy
...answer downvoted unreasonably. I'm writing lots of small parsing tests in .txt files and using ast.literal_eval to get expected output part. It's impossible to call float('nan') there, and this answer was helpful for me.
– Vitalik Verhovodov
Mar 26 '18 at 15:59...
SQL left join vs multiple tables on FROM line?
...ard can be viewed at http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt .
It took many years before database companies adopted the SQL-92 standard.
So the reason why the second method is preferred, it is the SQL standard according the ANSI and ISO standards committee.
...
What does yield mean in PHP?
...bers. Here is an example using an array generated by explode() on a large .txt file (262MB in my use case):
<?php
ini_set('memory_limit','1000M');
echo "Starting memory usage: " . memory_get_usage()
How do I use a custom deleter with a std::unique_ptr member?
...ample, with a FILE*:
deleted_unique_ptr<FILE> file(
fopen("file.txt", "r"),
[](FILE* f) { fclose(f); });
With this you get the benefits of exception-safe cleanup using RAII, without needing try/catch noise.
...
How do I create a namespace package in Python?
...ith namespace_packages=['package'], setup.py will add a namespace_packages.txt in the EGG-INFO. Still don't know the impacts…
– Laurent LAPORTE
Dec 9 '16 at 11:55
1
...
What are commit-ish and tree-ish in Git?
...--------------------
| 15. <rev>:<path> | HEAD:README.txt, master:sub-directory/
----------------------------------------------------------------------
| Tree-ish? | Examples
----------------------------------------------------------------------
| ...
How do I check for a network connection?
...DNS lookup on www.msftncsi.com, then requests http://www.msftncsi.com/ncsi.txt. This file is a plain-text file and contains only the text 'Microsoft NCSI'.
NCSI sends a DNS lookup request for dns.msftncsi.com. This DNS address should resolve to 131.107.255.255. If the address does not match, then it...
Regular expression to match DNS hostname or IP Address?
...domain names:
tld=$(curl -s http://data.iana.org/TLD/tlds-alpha-by-domain.txt | sed 1d | cut -f1 -d'-' | tr '\n' '|' | sed 's/\(.*\)./\1/')
echo "($tld)"
That should give you a nice piece of re code that checks for legality of top domain name, like .com .org or .ca
Then add first part of the e...