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Check if a given key already exists in a dictionary
I wanted to test if a key exists in a dictionary before updating the value for the key.
I wrote the following code:
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Which is more preferable to use: lambda functions or nested functions ('def')?
I mostly use lambda functions but sometimes use nested functions that seem to provide the same behavior.
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pandas: filter rows of DataFrame with operator chaining
Most operations in pandas can be accomplished with operator chaining ( groupby , aggregate , apply , etc), but the only way I've found to filter rows is via normal bracket indexing
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C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p
C++11 introduced a standardized memory model, but what exactly does that mean? And how is it going to affect C++ programming?
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Iterate over object attributes in python
I have a python object with several attributes and methods. I want to iterate over object attributes.
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How to get a random number between a float range?
randrange(start, stop) only takes integer arguments. So how would I get a random number between two float values?
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How does “cat
I needed to write a script to enter multi-line input to a program ( psql ).
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java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
I am getting an ORA-01000 SQL exception. So I have some queries related to it.
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How to make an HTML back link?
What is the simplest way to create an <a> tag that links to the previous web page? Basically a simulated back button, but an actual hyperlink. Client-side technologies only, please.
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Getting the last element of a list
In Python, how do you get the last element of a list?
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