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Proper way to declare custom exceptions in modern Python?
... way to declare custom exception classes in modern Python? My primary goal is to follow whatever standard other exception classes have, so that (for instance) any extra string I include in the exception is printed out by whatever tool caught the exception.
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How to iterate over rows in a DataFrame in Pandas
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DataFrame.iterrows is a generator which yields both the index and row (as a Series):
import pandas as pd
import numpy as np
df = pd.DataFrame({'c1': [10, 11, 12], 'c2': [100, 110, 120]})
for index, row in df.iterrows():
print(row['c1'], r...
What are the differences between Generics in C# and Java… and Templates in C++? [closed]
...nd generics are relatively new. I keep reading that Java made the wrong decision or that .NET has better implementations etc. etc.
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How to convert FileInputStream to InputStream? [closed]
...l be automatically closed when you close the wrapping stream/reader.
If this is a method returning an InputStream to the caller, then it is the caller's responsibility to close the stream when finished with it. If you close it in your method, the caller will not be able to use it.
To answer some o...
'Static readonly' vs. 'const'
...r various things around in our system. So I am wondering if my observation is correct:
18 Answers
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What is the reason why “synchronized” is not allowed in Java 8 interface methods?
...d methods are a shorthand for a method which behaves as if the entire body is enclosed in a synchronized block whose lock object is the receiver. It might seem sensible to extend this semantics to default methods as well; after all, they are instance methods with a receiver too. (Note that synchro...
Count(*) vs Count(1) - SQL Server
...wondering if any of you people use Count(1) over Count(*) and if there is a noticeable difference in performance or if this is just a legacy habit that has been brought forward from days gone past?
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What does `m_` variable prefix mean?
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This is typical programming practice for defining variables that are member variables. So when you're using them later, you don't need to see where they're defined to know their scope. This is also great if you already know the...
Is it better to call ToList() or ToArray() in LINQ queries?
...run into the case where I want to eval a query right where I declare it. This is usually because I need to iterate over it multiple times and it is expensive to compute. For example:
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What is the difference between min SDK version/target SDK version vs. compile SDK version?
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The min sdk version is the earliest release of the Android SDK that your application can run on. Usually this is because of a problem with the earlier APIs, lacking functionality, or some other behavioural issue.
The target sdk version is the v...