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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...mns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
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how to get the current working directory's absolute path from irb
...do is get the current working directory's absolute path. Is this possible from irb? Apparently from a script it's possible using File.expand_path(__FILE__)
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Remove specific characters from a string in Python
I'm trying to remove specific characters from a string using Python. This is the code I'm using right now. Unfortunately it appears to do nothing to the string.
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Semaphore vs. Monitors - what's the difference?
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A Monitor is an object designed to be accessed from multiple threads. The member functions or methods of a monitor object will enforce mutual exclusion, so only one thread may be performing any action on the object at a given time. If one thread is currently executing a m...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
...nt number of win32-centric or IDE-bound members.
One concern in migrating from SVN is that SVN's GUI frontends and IDE integration are more mature than those of any of the distributed SCMs. Also, if you currently make heavy use of precommit script automation with SVN (ie. requiring unit tests to pa...
Servlet for serving static content
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Though in order to serve content from a folder outside the app (I use it to server a folder from the disk, say C:\resources) I modified the this row: this.basePath = getServletContext().getRealPath(getInitParameter("basePath")); And replaced it with: this...
What are sessions? How do they work?
...side, after successful identification. Then for every HTTP request you get from the client, the session id (given by the client) will point you to the correct session data (stored by the server) that contains the authenticated user id - that way your code will know what user it is talking to.
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Git: How to return from 'detached HEAD' state
... this:
# you are currently in detached HEAD state
git checkout -b commits-from-detached-head
and then merge commits-from-detached-head into whatever branch you want, so you don't lose the commits.
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How can I find script's directory with Python? [duplicate]
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This won't work if you're running from inside an interpreter, since you'll get NameError: name '__file__' is not defined
– Ehtesh Choudhury
Feb 26 '14 at 21:01
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Create a custom View by inflating a layout?
...tView, etc), and in your constructor you can read the attributes passed in from the XML. You can then pass that attribute to your title TextView.
http://developer.android.com/guide/topics/ui/custom-components.html
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