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Adding git branch on the Bash command prompt

... git 1.9.3 or later: use __git_ps1 Git provides a shell script called git-prompt.sh, which includes a function __git_ps1 that prints text to add to bash PS1 prompt (includes branch name) Its most basic usage is: $ __git_ps1 (master) It also takes an optional format string: $ __g...
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Unioning two tables with different number of columns

... I realized that this solution also works without having to list all the columns. So instead of Select Col1, Col2, Col3, Null as Col4, Null as Col5 from Table2, one can also do, Select *, Null as Col4, Null as Col5 from Table2. – Pratik Patel Sep 20 '...
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Delete column from pandas DataFrame

... This answer isn't really correct - the pandas developers didn't, but that doesn't mean it is hard to do. – wizzwizz4 Sep 30 '17 at 9:42 ...
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What does “program to interfaces, not implementations” mean?

...t worried about implementation and the interface signature determines what all operations can be done. This can be used to change the behavior of a program at run-time. It also helps you to write far better programs from the maintenance point of view. Here's a basic example for you. public enum La...
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What is the meaning of single and double underscore before an object name?

...at least two leading underscores, at most one trailing underscore) is textually replaced with _classname__spam, where classname is the current class name with leading underscore(s) stripped. This mangling is done without regard to the syntactic position of the identifier, so it can be used to define...
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How to initialize a private static const map in C++?

... int>’ as ‘this’ argument of ‘std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int>...
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lodash multi-column sortBy descending

...dash.com/docs#orderBy) in Lodash as of 4.3.0. The normal sort function is called _.sortBy(lodash.com/docs#sortBy) – Nidhin David Feb 12 '16 at 11:19 2 ...
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Ignore .pyc files in git repository

...t to to do it beforehand, if you just add the line to the .gitignore file, all previously committed .pyc files will still be tracked, so you'll need to remove them from the repository. If you are on a Linux system (or "parents&sons" like a MacOSX), you can quickly do it with just this one line ...
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Fitting empirical distribution to theoretical ones with Scipy (Python)?

...error is determined. The distribution with the least error is returned. All Distributions Best Fit Distribution Example Code %matplotlib inline import warnings import numpy as np import pandas as pd import scipy.stats as st import statsmodels as sm import matplotlib import matplotlib.pypl...
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How to rename with prefix/suffix?

...available and you have to rename more than one file, shell scripting can really be short and simple for this. For example, to rename all *.jpg to prefix_*.jpg in the current directory: for filename in *.jpg; do mv "$filename" "prefix_$filename"; done; ...