大约有 40,000 项符合查询结果（耗时：0.0334秒） [XML]
What characters are forbidden in Windows and Linux directory names?
...ot create a folder named A if one named a already exists. Worse, seemingly-allowed names like PRN and CON, and many others, are reserved and not allowed. Windows also has several length restrictions; a filename valid in one folder may become invalid if moved to another folder. The rules for
naming f...
Why does an NSInteger variable have to be cast to long when used as a format argument?
...ending on the platform, the compiler recommends
to add a cast to long generally.
Update: Since iOS 7 supports 64-bit now as well, you can get the same warning when compiling
for iOS.
share
|
improv...
What is a semaphore?
...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter.
It's simply a way to limit the number of consumers for a specific resource. For exampl...
Why do we need to install gulp globally and locally?
2 manuals about gulp say that I need to install gulp first globally (with -g flag) and then one more time locally. Why do I need this?
...
What's the difference between Perl's backticks, system, and exec?
...It never returns true, because if the command is found it never returns at all.
There is also no point in returning STDOUT, STDERR or exit status of the command.
You can find documentation about it in perlfunc,
because it is a function.
system
executes a command and your Perl script is con...
Generating file to download with Django
Is it possible to make a zip archive and offer it to download, but still not save a file to the hard drive?
8 Answers
...
Delete specific line number(s) from a text file using sed?
...
Not all unixes have gnu sed with "-i". Don't make the mistake of falling back to "sed cmd file > file", which will wipe out your file.
– pra
Jan 22 '10 at 6:53
...
create a trusted self-signed SSL cert for localhost (for use with Express/Node)
...dejs/Express. None of them work properly because while the cert gets installed, it is not trusted. here's what I've tried that fails:
...
invalid command code ., despite escaping periods, using sed
...of sed, the -i option expects an extension argument so your command is actually parsed as the extension argument and the file path is interpreted as the command code.
Try adding the -e argument explicitly and giving '' as argument to -i:
find ./ -type f -exec sed -i '' -e "s/192.168.20.1/new.domai...
How to check if a string contains an element from a list in Python
...y strings in a list are found in another string, keep in mind that this is all that this solution does. It does not care WHERE the string is found e.g. in the ending of the string. If this is important, as is often the case with urls, you should look to the answer of @Wladimir Palant, or you risk ge...