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Selecting multiple columns in a pandas dataframe
... is in the
3rd & 4th columns. If you don't know their names when your script runs, you can do this
newdf = df[df.columns[2:4]] # Remember, Python is 0-offset! The "3rd" entry is at slot 2.
As EMS points out in his answer, df.ix slices columns a bit more concisely, but the .columns slicing in...
Use of an exclamation mark in a Git commit message via the command line
... still want a literal ! then turn off history expansion at the top of your script via set +H
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How do you implement a good profanity filter?
...tracked down a profanity word list (not unlike this one) and wrote a quick script to generate a new dictionary without all of the bad words (without even having to look at the list).
For your particular case, I think comparing the search to real words sounds like the way to go with a word list like...
JavaScript: client-side vs. server-side validation
...you can protect against the malicious user, who can easily bypass your JavaScript and submit dangerous input to the server.
It is very dangerous to trust your UI. Not only can they abuse your UI, but they may not be using your UI at all, or even a browser. What if the user manually edits the URL, ...
what is .netrwhist?
...
netrw is a kind of vim plugin/script which supports reading and writing files across networks. .netrwhist is a history file which maintains all the directories that were modified. So whenever you modify the contents of ~/.vim it adds one entry in .netrwhi...
Facebook Architecture [closed]
...oss many servers.
HipHop for PHP - It is a source code transformer for PHP script code and was created to save server resources. HipHop transforms PHP source code into optimized C++. After doing this, it uses g++ to compile it to machine code.
If we go into more detail, then answer to this questio...
Reset other branch to current without a checkout
I'm writing some scripts for my Git workflow.
3 Answers
3
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File I/O in Every Programming Language [closed]
...of all the lines in the file.
Therefore, the invokation of readlines() results in reading each and every line of the file.
In that particular case it's fine to use readlines() because we have to read the entire file anyway (we want its last line).
But if our file contains many lines and we just want...
What's the status of multicore programming in Haskell?
...s for Haskell, in GHC.
The Orc language, for concurrent job scheduling and scripting, was released.
A new scalable thread event manager was merged into GHC.
An improved approach to parallel sparks and strategies was developed.
The Nikola EDSL for embedding GPU programs in Haskell was developed.
The ...
What is the difference between “Form Controls” and “ActiveX Control” in Excel 2010?
...ng something simple, it doesn't matter which you use but for more advanced scripts ActiveX has better possibilities.
ActiveX is also more customizable.
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