大约有 47,000 项符合查询结果（耗时：0.0904秒） [XML]
Extracting specific columns in numpy array
...
I assume you wanted columns 1 and 9?
To select multiple columns at once, use
X = data[:, [1, 9]]
To select one at a time, use
x, y = data[:, 1], data[:, 9]
With names:
data[:, ['Column Name1','Column Name2']]
You can get the names from data.dtype.na...
What is a good regular expression to match a URL? [duplicate]
...ure URL starts with HTTP/HTTPS:
https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
If you do not require HTTP protocol:
[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
To try this out see http://regex...
Error to install Nokogiri on OSX 10.9 Maverick?
...
You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
Update
For t...
How to output only captured groups with sed?
...e output as well as specifying what you do want.
string='This is a sample 123 text and some 987 numbers'
echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*/\1 \2/p'
This says:
don't default to printing each line (-n)
exclude zero or more non-digits
i...
How to validate an email address in JavaScript
...
1
2
3
4
Next
5167
...
Regular expression to match URLs in Java
...
106
Try the following regex string instead. Your test was probably done in a case-sensitive manner...
What is the best way to compute trending topics or tags?
...
11 Answers
11
Active
...
How to change the order of DataFrame columns?
...
1
2
Next
921
...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
... [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
share
|
improve this answer
|
follow
|
...