大约有 15,000 项符合查询结果（耗时：0.0178秒） [XML]
What characters are allowed in an email address?
... validating emails:
(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:
\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(
?:\r\n)?[ \t])+|\Z|(?=[\...
Which version of Python do I have installed?
...
632
python -V
http://docs.python.org/using/cmdline.html#generic-options
--version may also work...
“Keep Me Logged In” - the best approach
...e that number is, let's imagine every server on the internet (let's say 50,000,000 today) trying to brute-force that number at a rate of 1,000,000,000 per second each. In reality your servers would melt under such load, but let's play this out.
guesses_per_second = servers * guesses
guesses_per_sec...
How to validate an email address using a regular expression?
...here it is:
(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:
\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(
?:\r\n)?[ \t])+|\Z|(?=[\...
How to get the list of all installed color schemes in Vim?
...
632
Type
:colorscheme then Space followed by TAB.
or as Peter said,
:colorscheme then Space fo...
CSS Font Border?
...d it.
Long code for just the border??? ...YES!!!
text-shadow: 1px 1px 0 #000,
-1px 1px 0 #000,
1px -1px 0 #000,
-1px -1px 0 #000,
0px 1px 0 #000,
0px -1px 0 #000,
-1px 0px 0 #000,
1px 0px 0 #000,
2px 2px 0 #000,
-2px 2px 0 #000,
2px -2px 0 #000,
-2px -2p...
Set default CRAN mirror permanent in R
...'.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f8475102%2fset-default-cran-mirror-permanent-in-r%23new-answer', 'question_page');
}
);
Post as a guest
...
StringBuilder vs String concatenation in toString() in Java
...{
StringBuilder s = new StringBuilder();
for(int i=0;i<100000;i++)
s.append("*");
}
private static void slow()
{
String s = "";
for(int i=0;i<100000;i++)
s+="*";
}
}
The output is:
slow elapsed 11741 ms
fast elap...
Why am I getting a “401 Unauthorized” error in Maven?
...-----------------------------------------------------
[INFO] Total time: 4.632 s
[INFO] Finished at: 2014-07-18T15:09:25-04:00
[INFO] Final Memory: 6M/19M
[INFO] ------------------------------------------------------------------------
Here's the full updated POM:
<project xmlns="http://maven.a...
How can you profile a Python script?
...s tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 0.061 0.061 <string>:1(<module>)
1000 0.051 0.000 0.051 0.000 euler048.py:2(<lambda>)
1 0.005 0.005 0.061 0.061 euler048.py:2(<module>)
1 0.000 ...