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How can I strip the whitespace from Pandas DataFrame headers?
...me
Columns: [ year, month , day, asdas , asdas, as , sa, asdas ]
%timeit df.rename(columns=lambda x: x.strip())
%timeit df.columns.str.strip()
1000 loops, best of 3: 293 µs per loop
10000 loops, best of 3: 143 µs per loop
So str.strip is ~2X faster, I expect this to scale better for lar...
Java's Virtual Machine and CLR
...a Virtual Machine works versus how the .NET Framework Common Language Runtime (CLR) works?
5 Answers
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What do querySelectorAll and getElementsBy* methods return?
...onsider adding a huge library to your project" I know 2012 was a different time, but even then I would've found that bit to be ludicrous.
– CoryCoolguy
May 8 '19 at 18:38
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What are the primary differences between Haskell and F#? [closed]
...d.
While Haskell is an amazing language, the major benefit of F# (for the time being), is that it sits on top of the CLR. This lends it self to polyglot programming. One day, you may write your web UI in ASP.net MVC, your business logic in C#, your core algorithms in F# and your unit tests in Ironr...
How to select date from datetime column?
I have a column of type "datetime" with values like 2009-10-20 10:00:00
8 Answers
8
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Flat file databases [closed]
...e (they can, in fact, put arbitrary code in your "database" to be run each time.)
Personally, I'd say - why not look to the future? There have been so many times that I've had issues because I've been creating my own "proprietary" files, and the project has exploded to a point where it needs a datab...
How to skip “Loose Object” popup when running 'git gui'
...t_gc procedure which does it and the place where it is called. At the same time I noticed that late 2011 there was added a configuration option for disabling the dialog. This change (part of git-gui 0.16.0) was merged to Git's mainline on 2011-12-14.
So if you use Git v1.7.9 or newer, you can disab...
Determine if running on a rooted device
...) {
Process process = null;
try {
process = Runtime.getRuntime().exec(new String[] { "/system/xbin/which", "su" });
BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
if (in.readLine() != null) return true;
...
How can I escape white space in a bash loop list?
...to use one of the above, a third approach (less efficient in terms of both time and memory usage, as it reads the entire output of the subprocess before doing word-splitting) is to use an IFS variable which doesn't contain the space character. Turn off globbing (set -f) to prevent strings containing...
Concatenating two std::vectors
... the copy method is a not such a good way. It will call push_back multiple time which means that if a lot of elements have to be inserted this could mean multiple reallocations. it is better to use insert as the vector implementation could do some optimization to avoid reallocations. it could reserv...