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Understanding the Rails Authenticity Token
I am running into some issues regarding the Authenticity Token in Rails, as I have many times now.
10 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...
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 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...
jQuery Mobile: document ready vs. page events
...ndling, basically everything before jQuery Mobile 1.4. Old way of handling is now deprecated and it will stay active until (including) jQuery Mobile 1.5, so you can still use everything mentioned below, at least until next year and jQuery Mobile 1.6.
Old events, including pageinit don't exist any m...
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 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 write very long string that conforms with PEP8 and prevent E501
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Implicit concatenation might be the cleanest solution:
s = "this is my really, really, really, really, really, really," \
" really long string that I'd like to shorten."
Edit On reflection I agree that Todd's suggestion to use brackets rather than line continuation is better for a...
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...