大约有 2,317 项符合查询结果（耗时：0.0280秒） [XML]
Where is Vagrant saving changes to the VM?
...that is not created using vagrant up in the first place. stackoverflow.com/q/14503932/80353
– Kim Stacks
Jan 24 '13 at 14:50
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Escaping regex string
...
Here's the relevant question for escaping the repl argument: stackoverflow.com/q/49943270/247696
– Flimm
Apr 20 '18 at 13:54
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How to use if - else structure in a batch file?
I have a question about if - else structure in a batch file. Each command runs individually, but I couldn't use "if - else" blocks safely so these parts of my programme doesn't work. How can I do make these parts run? Thank you.
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Difference between \n and \r?
...ystems, \n is the code for end-of-line, \r means nothing special
as a consequence, in C and most languages that somehow copy it (even remotely), \n is the standard escape sequence for end of line (translated to/from OS-specific sequences as needed)
in old Mac systems (pre-OS X), \r was the code for ...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
...gust 2012, so if you are from the future you should do your homework.
Prerequisites
Assumes you are using CentOS:
Remove current instance of NGINX (suggest using dev server for this)
If possible, save your old NGINX config files so you can re-use them (that includes your init.d/nginx script)
yum in...
How do I navigate in the results of Diff
... : return
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Quit viewing the diff : q
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How to break out of multiple loops?
...ops, what do I do' refactoring may not make sense.
– quick_dry
Oct 10 '08 at 1:11
using an exception may be easier whe...
Combine two columns of text in pandas dataframe
...taframe in Python using pandas. Two of these columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
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What is the email subject length limit?
... "folding".
subject is defined as "unstructured" in RFC 5322
here's some quotes ([...] indicate stuff i omitted)
3.6.5. Informational Fields
The informational fields are all optional. The "Subject:" and
"Comments:" fields are unstructured fields as defined in section
2.2.1, [...]
2.2.1. ...
Check whether a string contains a substring
...s what Perl is famous for:
if ($mystring =~ /s1\.domain\.com/) {
print qq("$mystring" contains "s1.domain.com"\n);
}
The backslashes are needed because a . can match any character. You can get around this by using the \Q and \E operators.
my $substring = "s1.domain.com";
if ($mystring =~ ...