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Transaction isolation levels relation with locks on table
I have read about 4 levels of isolation:
3 Answers
3
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How do I use the includes method in lodash to check if an object is in the collection?
lodash lets me check for membership of basic data types with includes :
3 Answers
3
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Easiest way to compare arrays in C#
In Java, Arrays.equals() allows to easily compare the content of two basic arrays (overloads are available for all the basic types).
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Is it possible to use the instanceof operator in a switch statement?
I have a question of using switch case for instanceof object:
24 Answers
24
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Does pandas iterrows have performance issues?
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Generally, iterrows should only be used in very, very specific cases. This is the general order of precedence for performance of various operations:
1) vectorization
2) using a custom cython routine
3) apply
a) reductions that can be performed in cytho...
Creating a BLOB from a Base64 string in JavaScript
I have Base64-encoded binary data in a string:
12 Answers
12
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Get a pixel from HTML Canvas?
Is it possible to query a HTML Canvas object to get the color at a specific location?
10 Answers
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Show diff between commits
I am using Git on Ubuntu 10.04 (Lucid Lynx).
11 Answers
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Python-equivalent of short-form “if” in C++ [duplicate]
Is there a way to write this C/C++ code in Python?
a = (b == true ? "123" : "456" )
4 Answers
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Use a list of values to select rows from a pandas dataframe [duplicate]
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You can use isin method:
In [1]: df = pd.DataFrame({'A': [5,6,3,4], 'B': [1,2,3,5]})
In [2]: df
Out[2]:
A B
0 5 1
1 6 2
2 3 3
3 4 5
In [3]: df[df['A'].isin([3, 6])]
Out[3]:
A B
1 6 2
2 3 3
And to get the opposite use ~:
In [4]: df[~df['A'].isin([3, 6])]
Out[4]:
A B...