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How to check if a particular service is running on Ubuntu
...services by running the following command:
service --status-all
On the list the + indicates the service is running, - indicates service is not running, ? indicates the service state cannot be determined.
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How to reverse a singly linked list using only two pointers?
I wonder if there exists some logic to reverse a singly-linked list using only two pointers.
33 Answers
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PHP and MySQL - how to avoid password in source code? [duplicate]
...he PHP code. A situation I do not really like, for example, since the code is also available in a repository.
9 Answers
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Regular Expression: Any character that is NOT a letter or number
...ng to figure out the regular expression that will match any character that is not a letter or a number. So characters such as (,,@,£,() etc ...
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Remove portion of a string after a certain character
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$variable = substr($variable, 0, strpos($variable, "By"));
In plain english: Give me the part of the string starting at the beginning and ending at the position where you first encounter the deliminator.
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Select by partial string from a pandas DataFrame
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Based on github issue #620, it looks like you'll soon be able to do the following:
df[df['A'].str.contains("hello")]
Update: vectorized string methods (i.e., Series.str) are available in pandas 0.8.1 and up.
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How would I skip optional arguments in a function call?
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Your post is correct.
Unfortunately, if you need to use an optional parameter at the very end of the parameter list, you have to specify everything up until that last parameter. Generally if you want to mix-and-match, you give them d...
How can I display an RTSP video stream in a web page?
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VLC also comes with an ActiveX plugin that can display the feed in a web page:
http://wiki.videolan.org/ActiveX/HTML
<OBJECT classid="clsid:9BE31822-FDAD-461B-AD51-BE1D1C159921"
codebase="http://downloads.videolan.org/pub/videolan/vlc/latest/win32/axvlc.cab"
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Remove elements from collection while iterating
...odificationException.
Suppose we have the following collection of books
List<Book> books = new ArrayList<Book>();
books.add(new Book(new ISBN("0-201-63361-2")));
books.add(new Book(new ISBN("0-201-63361-3")));
books.add(new Book(new ISBN("0-201-63361-4")));
Collect and Remove
The fi...
What unique features does Firebug have that are not built-in to Firefox?
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Firefox's native developer tools have come a long way since this question was
written. The differences have mainly reduced to the following points:
Can't stop the script execution on DOM mutations, XHRs, or cookie changes.
XPaths can't be copied.
Missing an events side panel in the In...