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Selecting with complex criteria from pandas.DataFrame
... in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 900
3 8 80 900
4 7 50 200
5 9 30 900
6 2 80 700
7 2 80 400
8 5 80 300
9 7 70 800
We can apply column operations and get boolean Series objects:
>>> df["B"] > 50
0 False
1 T...
Difference between “git add -A” and “git add .”
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This answer only applies to Git version 1.x. For Git version 2.x, see other answers.
Summary:
git add -A stages all changes
git add . stages new files and modifications, without deletions
git add -u stages modifications and deletions, without new files
Detail:
git add -A is e...
Create nice column output in python
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data = [['a', 'b', 'c'], ['aaaaaaaaaa', 'b', 'c'], ['a', 'bbbbbbbbbb', 'c']]
col_width = max(l...
When to use the brace-enclosed initializer?
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answered Apr 2 '12 at 13:38
celtschkceltschk
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How do I echo and send console output to a file in a bat script?
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Get program execution time in the shell
... of the TIMEFORMAT variable as the output format.
Example:
$ time sleep 2
real 0m2.009s
user 0m0.000s
sys 0m0.004s
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How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...ed a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this sum while compilation and print th...
Why would anyone use set instead of unordered_set?
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UPDATE and REPLACE part of a string
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725
You don't need wildcards in the REPLACE - it just finds the string you enter for the second arg...